kai

if someone says someone that you don't want to happen, you say kai
or if someone suggests that they have feelings for you, and you don't like them back, but you want to be mean
synonym : ew God no

kofi:will you go skydiving?
john: me? Kai! I don't want to die o.
or
kofi: hey diane will you out with me?
diane: Kai! I won't be caught dead with a fish like you.

adjei!

adjei means ouch or it serves you right in pidgeon English

Boy:You know that girl Emily?
Other Boy: Yeah
Boy: I asked her out and she said no
Other Boy: Adjei!

or
*hurts oneself*
Adjei!