narcotic

In Belarus we use this:

— Who's the guy in the closet?
— Excuse me?
— Oh, that's right. Sometimes you forget I'm a detective. See, there's all this steam in the shower like somebody was just in there. Only your hair's dry. So it must be somebody else we're talking about. A male somebody, because the toilet seat's up. Since he's not under the bed I figure you must have stuck him in the closet when you heard my key hit the lock a day early. So... who's the guy in the closet?