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Someone who talks a lot about absolutely nothing or talks in circles.
Glenn talked for an hour about Mike and said nothing. He sure is a blowcock.
by JYP February 05, 2010
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2
Someone (usually a guy) who talks big about things to make themself look better. What he can do, buy, etc. Usually what they are saying is not true at all, or it's a very large exaggeration of the truth.
James was being such a blowcock again, ranting about how many women he's been with and what type of car he drives.
by Pork and Beans September 20, 2007
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