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a bitch of (something)
rude slang An intensifying phrase used to emphasize that something (stated after "of") is very trying or difficult to deal with. Oh, I had a bitch of a time getting that nut off. I almost broke my wrench! This was really a bitch of a day—nothing went according to plan at all.
bitch of (a someone or something)
Inf. a really difficult person or thing. (Use discretion with bitch, a word many consider coarse or vulgar.) What a bitch of a day! He is really a bitch of a boss.