A unihole is when someone has so much double pentration that there is no longer two distinguishable holes, instead there is one gaping hole remaining. This serves a useful purpose as you can hide things in it.
"my unihole is hella sore from hiding my bowling ball in it" or...
"could you please remove your penis before i end up with a unihole"
"could you please remove your penis before i end up with a unihole"
by dr.babe April 27, 2006