Derf

The number between 6 and 7

"Yo what's that number"
"Nigga, it's Derf"

by killingbird September 9, 2016

Derf

Someone who isn't very smart, and gives you the constant urge to want to hit them in the face with a toy Nerf gun when you look at them or when they speak.

Ugh! Ray annoys me everytime I hear him talk! He's such a derf, I swear!

by Hustle_OnFleek December 28, 2022

derf

derf is unit of measure that measures derfs

the equivalent of a derf is one derf

by lookandlineage January 1, 2021

Derf

In mid-Michigan slang, to trip or fall.

I derfed it so hard on the trail this morning!

by Jnnza January 24, 2021

Derf demon

Being very successful at having sex through your pants at BYUI

Chase is an absolute Derf Demon

by Nav boi November 10, 2025