This can basically be anything. A noun, adjective, or verb is allowed. It can also be something you shout when mad, happy, or sexual aroused. You think of it, this word can be it
Do you have my bonkay??
I bonkayed this girl so hard last night.
That girl has some big ass bonkays.
I wish the vacation would come back, bonkay!
Camille told me she likes to bonkay.