Isn't he the homeless guy who puts on George's toupee after Elaine throws it out the window?
Yes.

Isn't he the homeless guy who puts on George's toupee after Elaine throws it out the window?

We named the horse Rusty. He ate too much Beeferino. made him gassy.

As the homeless guy in the Seinfeld episode "the Beard" he looks sexy.

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oh ok I rem that charachter but I can't place him looking like Jon Griesanyways isnt that kind of ironic about the tupperware..lol

I'm not even sure we were able to hear his name, but Rusty is a homeless man who in "The Beard" gets some food from Kramer. He is not supposed to keep the Tupperware, which contained the food, and Kramer tries to get it back - without success!
In "The Bookstore" (an episode that takes place much later), the same homeless person (Rusty) applies for a job at Kramer/Newman (to pull a rickshaw). He tells his name, but then runs off with the rickshaw!
I don't know if this is supposed to mean that Rusty has stolen from Kramer twice, or if we simply should not remember that it's the same person!