noun
a state of confusion or disorder
verb
to waste time or engage in aimless activity
adverb
in a careless or irresponsible manner
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It is important to focus on your work and not mess around during office hours.
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Let's not mess around and get this project done on time.
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Stop messing around and start studying for your exams.
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Life is too short to mess around with things that don't matter.