when you keep a small amount of liquor in, say a fifth bottle to distract from the secret, half gallon bottle hidden somehere. to have NO liquor in the freezer would be suspicious. this keeps the party from being at your house too long if friends drop by.
I'm glad we ditched Joe at the bar but now what, we drank all your liquor? Naw man that was just the decoy bottle i got a half gal. in the dresser!
(noun) an empty cigarette pack that is intentionally kept (not crushed or thrown away) so when someone tries to bum a cigarette it can be used to justify not giving them one.
guy1: what a party last night! man you got any cigarettes?
guy2: I'm all out. (gestures to decoy pack on coffee table.)
guy1: I guess I'll have to go get more then.
guy2: see ya.
(guy1 leaves)
(guy2 pulls fresh pack from pocket and lights one up.)