(n). 1. One who goes to parties, functions, and other events just for the freebies, but doesn't bring anything to eat/drink. 2. A guy/gal who goes out to eat, and when the time comes to divvy up the bill, says they are short.
3. Someone that does not reciprocate.
"Hey Paul, should I invite Bill?" "Oh, no, man! Not that charity crapper!"