Accidental, unintentional contact between your naked arse-cheeks and another individual's naked arse-cheeks, resulting in a panicked moment of pause, sudden development of perfect posture on bolting upright, butt-hole puckering and the grunted "sorry" cough being elicited. Commonplace at such establishments as gyms or work locker rooms.
Two individuals standing side by side at neighbouring lockers.
Individual One: *turns to the right, bends over*
Individual Two: *turns to the left, bends over*
momoland is a Kpop girl group made up of 7 members: Hyebin, Yeonwoo, Jane, Nayun, JooE, Ahin, and Nancy, they debuted on November 10th2016. their biggest songs are BAAM and bboom bboom
person 1: have you heard the song BAAM??
person 2: no, who is it by?
person 1: momoland
person : thats cool, I like momoland's "bboom bboom"
a guy who is so obsessed with nancy that he will die for her her he watches nancy 24/7 and use google and doesnt do anything by himself and is filled with inappropriate behaviour