Gum Hum 

Oral sex of the penis performed by a toothless individual. Such persons Mike include an old woman or a toothless prostitute.

The old lady I met at the grocery store followed me back home and gave me a gum hum.

That toothless meth whore gum hums really good for $5.

Gum Hum by Eaton Holgoode April 11, 2017

Gum and Hum 

Gum and Hum. (Gum and Hum) When a woman of any age removes her dental anatomy to perform a specific type of fellatio that combines both rubbing the shaft and tip of the cock with one's gums and humming different jolly time sea melodies.

Last night was boss! Edith gave me the old "Gum and Hum" and we aren't even going steady! Gee, my knob sure felt keen!

Gum and Hum by PerfecTwist September 8, 2013

gumhummer 

The same thing as a gumjob or gummer. It's a hummer from someone without any teeth.

I met this 80 year old chick at the bar last night. She took me home and gave me a mean gumhummer!

gumhummer by Big Big Banger November 20, 2006