Top Definition
The slight moaning sound a man makes while receiving a hummer.
There's no more musical sound than that of a hummer accompanied by a hummeroo.
by calmling December 30, 2007
A screecheroo that is flattened. I don't know what it does, but I'm under the impression that it hums rather than screeches.
My friend makes hummeroos every Halloween.
by wcgold May 21, 2005
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