what's in it for meWhat are the advantages of (something) to me, personally?Before agreeing to volunteer, she asked, “What’s in it for me?”
what's upWhat’s the matter? What is the problem? What is wrong?You're looking a bit miserable. What's up?
what's cookingA greeting, similar to how are you?; what's happening?; what's up?; what's new?Hi there babe, what's cooking?