這人性格不好，對人態度差，自私自利，說話做事不考慮別人etc.

The b-word is the female equivalent of "a**hole"

還有作為動詞是“抱怨”的意思。例句：

"So I told my roommate that if he has never done anything personally to try and make society a better place, then he should probably quit bi*ching about it with an undeserved sense of entitlement."