Gumbumpin 

Getting a blowjob from someone without teeth.

That granny Smith over yonder sure good at gumbumpin.

Gumbumpin by Maddog936 August 8, 2018

gumbumpin' 

Slang for eating; originated from watching old people eat food without their dentures.

That home made banana pudding was some good gumbumpin'!

gumbumpin' by Apexer August 7, 2009

Gum Bumpin

To speak of something you know nothing about. To spread rumors, gossip, or speculate without all of the facts. See also (Trash Talking) (gossiping). (hating)

I wasn't even there, see Joe's gum bumpin again!

Gum Bumpin by JVRAS August 6, 2011

Gumblumpkin 

The act of getting a blowjob from a girl with no teeth while sitting on the bowl taking a shit.

Your grandmother gives the best Gumblumpkin at the senior home.

Gumblumpkin by Big Mate July 17, 2011

gumbuffin 

a black and white muffin

my cat was black and white, so i named him "muffins", short for "gumbuffins"

gumbuffin by dan gregorich September 28, 2005

GUMBUMPERS 

Gossips and/or person(s) with the inability to mind there own.
USEAGE: GUMBUMPING

Gumbumpers get hurt sometimes from talking to much

GUMBUMPERS by J-Verbal Tha "Werdologist"" May 13, 2005

gullumping 

When you and your gay partner insert the same straw into each other’s penis and keep thrusting until both of you cum into the straw therefor basically make you swap semen then being gullumping

I love Gullumping it’s so fucking stimulating!

gullumping by Loom bands intit October 11, 2021