In the Chinese language, it means smelly vagina.
Gary: Hey bro, that Asian chick I went down on last night had some chow hai's.
Adam: You gotta find those on diets. They consume foods lower in sodium. So it's not usually a salty lick.
Gary: I see. I see. Hopefully I get a clean one.
1) literally, phonetic chinese slang for stinky pussy.
2) also used to refer to objects which one finds unaesthetically pleasing.
Dieter said that girl he went down on last Thursday had some major chow hai.
That shoe is so chow hai...too bad they don't have my size in the ones that are lang hai.