What's on your mug?

Very moody. Happy one minute, upset the next.

Andrew has been acting sometimey lately.

By PriceLess

an adjective. Used to describe someone who only wants to know you when they want something - other than that you never hear from them.

Renee is such a sometimey bitch. I haven't talked to her in two months, but now she wants to borrow my car!

By winnie123

Synonym with bipolar.

His mood is very sometimey. He should definitely see a psychiatrist.

By BaconSkye