“Je weet toch” was the original, classic and epic expression which was originated in Amsterdam, The Netherlands.

Meaning :

You know (what I mean, what it is, what’s up)

Other cities tried to think of something similar and took inspiriation of “je weet toch” and changed it to “je weet zelf” or “jwz” mostly used by teenagers.

Nice to know:
The popular radio station FunX used “je weet toch” in their bumper ad.

1.used as a substitute for okay
2.acknowledgement

It means “je weet zelf” (Dutch) aka “you know it yourself”

Something not sweet or not cool or something you don't care about. Originating from Bergen Catholic High School's lingo in Northeastern New Jersey.

Feet!

Used after a sentence to enhance the outcome of what's being said.

Used after a sentence to enhance the outcome of what was trying to be said