1) When you cum
in your boxer shorts, leaving them sticky. Usually caused by either having a wet dream
or by jacking off
2) Shorts worn by a females that are so tight they hug the girls bum cleavage
, so it can be clearly seen. Sometimes also associated with cameltoes
. So named as they appear to stick to the bum.
1) I dreamt about my girlfriend naked last night, but when I woke up, I found I had sticky shorts
2) Did you see that ass - she was totally wearing sticky shorts