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1.
an individual who engages in the relentless act during a conversation of telling you how superior he or she is, either by direct or indirect means and regardless if you ask. Everything is about him/her. Figuratively pounding the chest, such as an alpha male gorilla.
Golfer #1: Hey, how have you been?
Chest Pounder: Well, I shot a 75 today. I can't really score well on this course.

Bowler #1: Hey....how's it goin?
Chest Pounder: 237....these lanes are too oily to really score well.
by BulldogBuckeye September 15, 2009