Urban Dictionary: Uncummable

When you're trying to make someone cum and you're doing everything that you can and using every trick in the book and they just can't/won't cum

I went down on a chick for two fucking hours and she just didn't cum.

She's "Uncummable"

by Trucky Pup January 28, 2017

Unable to cum, or having difficulty ejaculating from genital stimulation

"Behold the uncummable cock! Wait your turn in line, one ticket gets you three tries! No one's ever succeeded!"

by Joyboy203 July 09, 2021