I have no idea why he didn't become a little more popular. When you think of The Karate Kid, William Zabka got at least 2 more well known movie jerk roles out of that movie. But You never saw that much more of THomas Wilson. He was in stuff, just not really big stuff.
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Old Biff coming over and bullying old George 30 years later is so freakin hilarious, probably my favorite Biff moment in the whole trilogy.
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Old Biff: "Hey, kid. Say hello to your grandma for me".

"Is that the one with the donkey and the chambermaid"?

Yeah, he played the part really well.
"I'd like to know who's gonna pay to get my shirt cleaned? I spilled beer a5b4ll over it when that car hit me."
LMAO!

"What are you lookin' at, butthead? Say hi to your mom for me".
I like how he didn't play Biff over the top, but made him nasty yet still believable.

"Uh McFly, why didn't you tell me the car had a blind spot? "
LOL!!

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Hahahhaha that line is hilarious, Wilson owns, he did great work on Freaks and Geeks too, another show all of you should watch, buy it on DVD.

I love those "I hate manure!" lines

best line of biff's, hands down and hasnt been said yet (When marty is watching the biff tannon documentary and BTTF2)
BIFF: Let me just say one thing God bless America

The best conversation.hands down would be when Marty confronts Biff in alternate 1985 in his hotel about the almanac, the one right after Biff is in the hottub and those girls leave. "An old man shows up, he says he's an ancestor of mine.I don't see the resemblance"

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After having seen this movie a bunch of times, I'd probably suspect it was me from the future. ^_^

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• Whaddaya think? Griff just calls me grandpa for his health?
• Where's that punk Calvin Klein?!

^ yeah! he sort of sputters out the words!! (probably due tohis short circuits in his bionic implants!)
oh and then there is also the -
BIFF - '$300 bucks? thats b***t ..(guys name cant remeber.. henry?)'
GUY - 'no it was horse s'
hehe, its great!
Dad Dad Dad Daddio

All classic linesbut gotta love in BTTF II when Marty pushes Griff in the diner and Griff says. "Well.so when did you become the physical type?" LOL, it's just how he sounded when saying it. Total classic line!

' i dont know what alcohol tatstes like cause im too young to drink it..'
i love those lines!
Dad Dad Dad Daddio

I love the bit in BTTF2 where Biff if telling the story of how he got the almanac to Marty and he says that old Biff turns up claiming to be a relative and he says: "I see no resemblance".
Also I like when Stricland asks Biff if he can smwll booze on his breath and he's like "I wouldn't know" and gives that line really innocently about not being 21 yet! Great acting by Tom Wilson!! God I love that guy!

"What are you lookin' at, butthead?"
"MANURE!!! I HATE MANURE!!!"
"So why don't you make like a tree, and get outta here."
My favorite Biff Tannen lines.

My favorite Biff line is in the first movie at the beginning I'm probably not saying it right but
"I have your car towed to your house and all you got for me is light beer?"

Probably my favorite part in the whole trilogy is the conversation between old and young Biff.
-And another thing, how do you know where I live?
-Let's just say we're related, and that bein the case I've got a little present for you. Somethin that will make you rich. You wanna be rich, don't you?
-Oh yeah, right, he he, that's rich, you're gonna make me rich?
Biff's 2015 shoes make me laugh every time I see them. In the scene where Marty and Doc are parked kind of in an alley and are talking about the sports almanac, Biff hobbles across the background. It's sooo funny, look for it.
I don't like Griff as much as Buford, 1955 Biff, 1985 TP Biff, 1985 LP Biff, 1985-A Biff, or 2015 Biff.
I'm afraid you're just too darn loud.

"You wanna marry that girl, Biff? Well, I can make it happen."-Old Biff
"Yeah, and who are you, Miss Lonley Heart?"-Young Biff
"Just get in the car, Tannen. Today's your lucky day."-Old Biff
"HEY! If you dent this car I'll kill you! This cost 31c8400 bucks!"-Young Biff
"Would you shut up about the car?"-Old Biff
The lines on the BTTF Ride are great too.
BTW, did you notice Old Biff's shoes? They are very strange lol! You can only see them when Old Biff climbs in the delorean and climbs out before he starts to die.
You know, I also noticed that Biff doesn't seem as upset as Buford is when he learns he said something wrong. When Old Biff tells him it's leave, he just throws the book and yells, "Fine then LEAVE!" but I just noticed last time I watched Part III that Buford seems upset when that guy in his group says, "It's dog, Buford. Hunt you down like a dog." or something like that lol!
Besides all the lines that show how Biff says a lot of things wrong, I also like the "Hey McFly!" lines. Well, except Griff's Griff was really weird. He was the only Tannen who didn't fall for the, "What the h*ll is that?" trick lol.
"Stupid cheese!"-Harold from H.A!
"Buttheads."-Biff
"Great Scott!"-Doc