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...
by DR. Greenthumb #1 October 3, 2008
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!
by E-Nasty February 26, 2010
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!
by CPSC October 3, 2010
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:"
Person A: "I will marry this rug"
Person B: "What?"
Person A:"It was just a Blumper:"
by Jupiter Wu March 11, 2021