coughing burping, and hiccuping at the same time.
"bro I just did a MAYJOR barp"
a "boomer bomb" is when your dad tries to be "hip" right in front of all your friends. this could also be when people on facebook post memes.
dad: yo, this is so hashtag lit!
child: dad stop you are embarrassing me in front of all my friends!
dad: you mean your homies?
dad you are dropping a boomer bomb