when something is hidden from view of everyone else appart from the people in the gangect.
usually in a bust ect.
jack: sikm8 i just stashed some booze for when we go camping
bill: sik m8, i bought some fireworks aswell, lets stash them so the dibble don't find them
jack: i stashed some booze for when we go out camping
bill: sik one m8dats pretty ill lol dat booze got well stashed
By Collie
Stashing
Stashing is when you're in a relationship with someone and you refuse to introduce them to your friends and family; mostly because you view the person as temporary, replaceable, and/or you're an asshole.
Friend: "Hey have you met John's parents yet? You've been together for months"
Stashee (or person being stashed): "No, I think he's stashing me. We don't have any pictures together either."