When somebody is fat and an asshole you call him a dikzak.
You're such a dikzak
A Dutch insult which means fatty.
Commonly used between friends.
Pieter: Ayy dikzak
Alexander: Ayy
Swankie dikzak is a noun that is Belgian slang for a fat person who really loves Cola and other sweets.
That swankie dikzak is sipping on that good shit again.