When finished busting a load on someone, one proceeds to take two pieces and bread in which they scrap the remains onto the bread and feed it to the recipient.
Someone who constantly self-promotes their own talent, products, or business interests, to the annoyance of everyone around them. Usually an artist or musician, but sometimes a booking agent, salesperson, consultant, or other self-employed business-type.
Joe: Dude, did Dave tell you about his band's new CD?
Alan: Did he! He went on for 20 minutes about how it was going to go Platinum within a week. That blowbag!
Do you need some free blowage tonight? Yeah. Thanks.
Glaze my holy hole! EMBRACE YOU INNER HOLY HOLE!!!\
Come over! We can play blowage...
It'll be fun AF