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1. rude slang To waste time with someone or something. I can't believe we spent the whole day just fucking around online.
2. rude slang To deceive someone. In this usage, a noun or pronoun can be used between "fuck" and "around." Come on, don't fuck me around. Is this a serious offer or not?
3. rude slang To be promiscuous. Well, I wouldn't trust Phil if I were dating him—I hear he fucks around.
1. Fool around, engage in frivolous activity, as in Stop fucking around and get the job done, or I'm tired of fucking around-let's go home. [ Vulgar slang; 1920s]
2. fuck someone around. Cheat, treat badly or make trouble for someone, as in Stop fucking me around; I know what you're up to. [ Vulgar slang; mid-1900s]
3. Be sexually promiscuous, as in Doesn't he have a reputation for fucking around? [ Vulgar slang; c. 1930]
in. to waste time; to mess around. (Taboo. Usually objectionable.) Stop fucking around and get busy!