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1.
adj: Describes someone who struts around town like he owns the place; Someone who thinks they're the cock-of-the-walk.
"Get a load of this Billy Crystal that just walked into the room...he'll probably ignore us all."
by Joofish March 01, 2008
 
2.
A person they show everytime a Yankees game is on television. He may have done something funny at one point, but that was too long ago, or too mediocre for me to remember.
It wouldn't be a Yankees game if we didn't get a shot of Billy Crystal sitting in a luxury box.
by Tourists... April 07, 2005
 
3.
Slang for methamphetamine.
Yo, anybody know where I can find Billy Crystal?
by bamerdope January 18, 2014