decoy drink
A cocktail that doesn't contain any alcohol. Reserved for friends that are too drunk to notice the difference but refuse to stop drinking.
"Dude, Kaitlyn can barely stand. Why do you keep giving her vodka tonics?"
"Chill, man. Decoy drinks... nothin' in there but tonic."
"Chill, man. Decoy drinks... nothin' in there but tonic."