The japanese word for breast(s). don't say opais because that doesn't work. the japanese don't have plural words. the japanese specify the amount of something.
May be used as a noun, adjective, verb or exclamation/interjection. May replace almost any word. Use as conjunction or adverb may be controversial and frowned-upon by members of the population who prefer to be able to interpret/comprehend speech.
Person 1 - Hey John, do you want me to opay down to the store and grab some opays? I think we're running low.
Person 2 - Opay! Yeah bro it's about time. I haven't been able to opay an opay for like opay weeks now, it sucks.
Person 1 - You want me to opay any other opays while i'm opaying down at the opay?
Person 2 - Yeah opay an opay and some opays for opaying the opay opay. Also opay an opay for the opay opay for jogabonitoi opay opay opay. Opay!