Best definition
Whatspapin is a Belgian-Dutch slang made by the rapper Chahid and refers to the American slang whats poppin. Although what’s

up is the norm on the Dutch streets, it became popular in The Netherlands after the remix with a few other Dutch-Moroccan rappers.

Guy 1: Ewa whatspapin!

Guy 2: Wesh wesh cousin! (What’s up, my cousin!) I keep it cool!

Guy 1: Aight then! I’m fine!