I. stash 1 /stæʃ/ BrE AmE verb [transitive always + adverb/preposition]
informal to store something secretly or safely somewhere
stash something away
He has money stashed away in the Bahamas.
stash in/under
You can stash your gear in here.
II. stash 2 BrE AmE noun [countable]
an amount of something that is kept in a secret place, especially money, weapons, or drugs SYN hoard :
Mike went into the bedroom to check on his stash.
stash of
a stash of drugs