The act of taking a dump without flushing, then letting another person take a dump on top of it.
I was bunkbedding a shit in the tolet.
by Big dick dave August 28, 2013
After intense sex and finishing, most likely doggie style; the top partner falls asleep without pulling out.
Last night, we were so drunk, we ended up bunk-bedding.
by JessicaWhitePass August 11, 2014