A phrase derived from the phrase, “boom boom” which means to go poop
Boom boom buttcheeks is used to refer to somebody’s diarrhea or great number of smelly farts
The difference between “boom boom” and “boom boom buttcheeks” is that “boom boom” is a temporary thing. When sombody goes boom boom, they take a few minutes to poop and are done. When somebody has boom boom buttcheeks, their buttcheeks are characteristic for going boom boom. Or in other words - as stated above - boom boom buttcheeks is another word for diarrhea
Don’t go over to Jeff’s house today. His sister has had boom boom buttcheeks all day, making his house smells like a port-a-potty
The act of grinding on a random person-particually on a male- in a bar while he is paying his tab.
Random Guy: Wait! I am boom boom powing right now! Gimme a sec.
The act of producing urine and/or feces inside of a public dressing room.
"I stopped thrifting with Robert after he got us kicked out of Savers for performing a dressing room boom boom."
Hugh: "Wanna have some boom boom pow?"
Janis: "Yes. I consent to boom boom pow."