heroin. originates from attempts to be discreet on the phone; instead of asking for "bags of heroin" users are encouraged to talk about "bags of dog food" or "bags of alpo." like dog food, heroin is sometimes brown.
A term that describes that the bar or club that you are at is lacking attractive women, and further indicates that the ones present are considered DOGS. Alpo is a brand name of dog food.
I think it's time to go home and call it a night, it looks like it has been another Alpo Night at every bar and club we've been at today, not one hot looking babe in sight!
