A gathering of a group of gay men in an alley next to garbage dumpsters for the purpose of engaging in a homosexual orgy. One or more of the men often lean against a dumpster while giving or receiving a sexual move. Dumpster parties often occur late at night in alleys next to bars or fast food restaurants.
Let's meet up in the alley behind the Manhole bar in 10 minutes for an impromptu Dumpster Party. Several dudes are really going to give it to Diamond!