"
Kuy" in
Thai slang word is defined directly as a male's genitals. The word is rude and should only be used with close friends.
The word "Kuy" is often used in conversation as a
remark/reply to someone else. Can be compared to the word "fuck you" or "ass".
Scott: Hey man, please don't ever scream, your voice sounds
like a girl.
Jason:
Kuy...