Guai 

Pronounced "g-why"; a colloquial Chinese adjective used most often by parents as a statement of their child's good behavior. Also commonly used in English conversation to describe responsible or respectable behavior among friends, or as an informal term for praise.

Me: Dude, I killed that essay. Worked all night without touching Facebook paid off: I got pretty much full score!
Joe: NICE. So guai!

Guai by r4wr89 July 1, 2011

Guai 

From the Chinese， 乖， meaning very well-behaved, good.

"Your children are very guai! Not like those brats over there."

Guai by wuzhu February 1, 2018

Guai 

A synonym for cigarettes used by teenagers in South Africa 🇿🇦

Sjo bru, lets go slat a guai before class?

Guai by Miancpt July 15, 2020

Guai 

Slang for cigarettes in South Africa

Sho Bru let's go slat a guai quick.

Guai by Jirrrbru July 15, 2020

Guai 

Meaning cigarettes in south africa. Another word for ent.

Bra let's go smoke this guai my hands are shaking.

Guai by Jirrrbru July 15, 2020

Guai 

Pronounced "why"

Spanish slang for cool.

El show de la noche pasada fue super mega guai.

Guai by VickyT February 3, 2008

Guai lan 

Literally means "Strange penis" in hokkien,

means someone who is very hard to deal with

some of the Singaporean damn guai lan

Guai lan by Lim pei October 28, 2009