What's Another Name For An 18-Wheeler?

Posted Dec 17th 2008 5:05PM by TMZ Staff

A semi!

While celebrating his birthday (again) at a bar in NYC, Jamie Foxx demonstrated the improper way to tip your waitress.

Not to be outdone by himself, Jamie then rammed his denim dart into the backside of a far-more-than-willing stage crasher.

41 never felt so good. Thanks, iNew York.