When you are doing some chick and are about to shoot your wad...you pull out and use careful aim to blast your man juice STRAIGHT down the part of her hair giving her her own new hairstyle...the Blowhawk!!! Chicks love it!
So, you would take some little runt (probably a guido) with a blowout and shave the sides of his head, leaving a stripe down the middle, also known as a "blowhawk."
Easy to do while passed out drunk. It's fun for everyone.
2. This guido I know from Strong Island was trying to peep my girl but he had a blowhawk so I smacked up his face.