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

derf

a derf, otherwise know as an idiot is used when someone is being stupid (an idiot)

“Quick being a derf, ya derf”

Derf

The number between 6 and 7

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

derf

derf is unit of measure that measures derfs

the equivalent of a derf is one derf