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Boomdangle refers to a penis that has only reached half erection. This can also be known as a chubs or mini-bone. It occurs when a male is unsure about the circumstances he is in or is under the influence of a mass amount of alcohol. It is also cause by a minimal amount of fear that is not fearful enough to bring on the full fear boner.

Comes from the English Words "boom", which refers to the erected part, and "dangle", the flaccid part.
Guy1: Man i got fucked up last night.
Guy2: Did you have sex with that fat chick?
Guy1: Sorta, all i could get was a boomdangle.
by mikes-erectile-disfunction November 28, 2010
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