A utility insult, like ass hat; the blow indicates that there is no substance, a bullshitter, pejoratively riding on the coattails of blow job. Fuck is just the usual super insult puncuation.
What a blow fuck!
I came this close to hitting that blow fuck!
by Nigel September 9, 2004
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While Making fun of white people there ask where's the cocaine because white people are known for doing crazy stuff
Sue: Merissa this party is awesome I'm trying to get wasted

Merissa : well wheres the fucking blow
by LifetimeJelly February 28, 2016
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