A wild party where beer is served (usually in disposable plastic cups) from a keg. Keggers are usually associated with high school and college students, but anybody can throw one if they've got a lot of friends and at least one keg of beer.
"Were you at Steve's kegger on Saturday night? Jessica and Ashley got drunk and made out with each other in front of everybody. It was awesome!"
by Deejster October 19, 2006