When you are rejected or told 'no' or even dissed so bad, that the only reply you will hear is 'chai'
person 1: Well atleast my birth certificate isn't an apology letter from the condom factory!
person 2: ...*dumbfounded*
person 3: Yoohhh Chai!
Pronounced 'chair' with no emphasis on the 'r'. Ch-Eh
When you want someone to give you something then you say "che"
Person 1: *pulls out lighter*
Person 2: Eyyy che lighter there !