Where does “rabz kebabz” come from?

rabz kebabz (English) comes from English rabz, from English rabak, from Malay rabak.

Ancestry of “rabz kebabz”, step by step

rabz kebabz traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	English	rabz	}}
2	English	rabak	Out of control, messed up; by extension terrible
3	Malay	rabak	—

Step	Language	Word	Meaning
1	English	kebab	A dish of pieces of meat, fish, or vegetables...
2	Arabic	كَبَاب	roast meat, kebab; fried meat