Pulp Fiction fans might be able to recognize who Pierce is dressed as in this scene: The Gimp.
Added:
It's Abed's birthday. That means an homage to his favorite movie on the 3/24/11 episode, Pulp Fiction.
Added:

Community Season 2 Episode 19 Quotes

I like your sweater. Did it come with a golden retriever?

Jeff

Abed: What could I do? It was Cougar Town.
Jeff: If you want me to take it seriously, stop saying its name.