Derfarup 

Its the noise you make when you see something which causes great excitment!

P 1: OMG THERE GIVING A THOUSAND DOLLARS TO THE NEXT CUSTOMER AND YOUR THE NEXT CUSTOMER
P 2:DERFARUP!!!

Derfarup by gleback June 26, 2009

derfartpuff 

The German word for flatulence, really!

An often audible discharge of intestinal derfartpuff..

derfartpuff by Scottytoearth November 19, 2023