When one sits face to face with another on the toilet…legs spread on the bottom bunk, so that defecation and urination can occur between the legs from the top participate.
When 2 people use the same toilet at the same time. One person using the normal seating position on the bowl, and the other takes a seat on the top tank Upper Decker. Term originated at a warehouse in Holbrook, Long Island.
All the stalls but one were full, so me and Jose did BUNK BEDS in the only emptystall.
Building bunk beds or bunking is a PG term for sexual intercourse that is mum friendly i.e can be spoke freely without the worry of children repeating.
Cece "oh had a good session of building bunk beds last night"
Leah "I had fun bunking last night too!"