an acronym for "knife up the uterus"
a kutu is that type of PMS or menstrual cramp that hurts like a motherfucker and makes you want to sit in bed and cry, bitch and moan all day (and you usually end up doing just that). the kutu is without a doubt the worst and most painful cramp a woman can have. if a girlfriend or a friend has them, you should be as nice to her as possible, because chances are those kutu's are making her have a really shitty day.

A Bloomer is someone with a bright outlook on life who is optimistic in nature. Bloomer's frolic in every opportunity to be happy and try to make the most out of life. The opposite of a Bloomer is a Doomer. The term Bloomer originated specifically as a counter to the Doomer on sites especially like 4Chan.