to produce excrement
(other slang:
Steam one out
Launch the submarine
Drop the kids off at the pool
Pinch a Loaf
fertilize
move the bowels
stink it up
squat and grunt
revisit food post-digestion
feed mr. flushie
push one through
take a crap
make a shit storm
Clean the poop chute
roll a dirty burrito
making homemade sushi rolls
excrete

A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy