When you are getting some great head, from some young and dumb. You are about ready to climax, let out a nasty fart right in her face, cum in her mouth. Then you get up and leave, with a smirk on yer face. Call all your buddy's laugh about it over drinks...
Last halloween, Paul gave this dish rag whore a phantom blumper, and she liked it...
A variation of the Blumpkin; getting a blowjob while giving an Upper Decker.
Yo man, I met this girl at this doucher's house and took her in the bathroom and got into an amazing Blumper Decker. That girl gives a great hummer and that doucher's bathroom is gonna smell like shit for weeks!
The act of receiving a blumpkin while taking an upper decker as the female is also giving two guys on the sides handjobs (the head and hand movements mimic a pterodactyl flying.)
Dude, I felt like I was in the prehistoric era because of how believable her pterodactyl was when she was giving us a blumper-decker-dactyl!
Blumpers: Slang for a woman with notably large, eye-catching breasts.
Did you see that girl’s blumpers?
A statement that's not exactly true but expresses an emotion.
Example: when you say "I will marry this rug, " You won't actually marry the rug, but the statement shows that you love the rug.
Person A: "I will marry this rug"
Person B: "What?"
Person A:"It was just a Blumper:"