occurs whenever a bomb party is announced although occurs more specifically at birthday/wedding parties etc. where there is one person for sure who must "celebrate".
bartender: sure, but you gotta have a bomb side.
guy 1: what? why?
bartender: dude, you're at a bomb party, they come with your drink.
guy 1:okay, i'll take a jagerbomb.
bartender: one jagerbomb and a beer comin' up.
ce: what on earth is a bomb party?
cj: bomb = awesome , amazing, imagine anything that might be fun, and it will be there