that quasi-mustache frequently worn by boys going through puberty or those of mexican descent. Not exactly a mustache but not not a mustache. More like dark hair on the upper lip. Creepy dark hair.
"Dude sarah thinks JJ is hot"
"Gross dude he's rockin a half stash"
somethin ur not supposed to bring somewhere....so u bring it secretly....it can be a stash of weed, porn mags, alchohol....etc....mostly u bring it secretly for the good of the whole group, not only to b used by u...like for parties..but u have to sneak it past some1 like ur parents for example
-hey im bored being stuck here for 2 days...this spiritual retreat sponsored by our school and forcing us to sign up sucks-any1 got a secret stash to keep us busy 2nite?
-yep i got some dope weed and beer, lets party!
-k not too loud tho u'll wake the nuns...remember its past lights out time
A porn stash is a slang for "pornography moustache". These were very comman in the 70's along with the fuckingbush in the pubic region. A more modern porn stash is similar to the one the famous Ron Jeremy has.