to get a blow job while eating a hoagie. This definitoin developed on the "preston and steve show"- a radio show from philedelphia. a caller came on the air and said he saw a man in a car getting his dick sucked while eating a hoagie. They came up with the name blowgie.
dude last night i was so hungry, and also a bit horny, so i got my girlfriend to give me a blowgie