Derf

1. When someone accidentally calls you anderf when your name is Andrew and it sticks forever

2. A really fucking dumb and weird boy

1.yo derf

2. That kid is such a derf

by Djalma si December 4, 2017

Herfing the derf

It is discribed as "Fucking the fucked"; To have sexual intercourse with a fucked up person. May sound unusual in a way to make people just say: "Was that a threaten?" or Having no idea of what has been said..

DUDE!? I totally saw you and ashley herfing the derf with each other.

Parents: Did you do anything dirty in tha room?
Me: No? I was just Herfing The Derf
Parents: Oh Okay good?

by TheGuyWhoCanTalkLikeThis August 7, 2011

Derfed

Gettind owned, hazed, roasted, loosing in a humiliating way.

You just got derfed!

by Freddy777sw December 11, 2017

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