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at it

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at it

doing something Our school's staff includes new teachers and teachers who have been at it for a long time.

Usage notes: often used with the verbs be and go, and sometimes used to mean that people are arguing, fighting, or having sex: When I turned around, the boys went at it again. It sounded like the couple next door were going at it all night.

at it

Vigorously pursuing an activity, especially a fight, but also sex or some other activity. For example, Whenever they play bridge they really go at it (fight), or The new job keeps Tom at it day and night (works hard), or In the spring the dogs are always at it (sex). Shakespeare used this seemingly modern idiom for "fighting" in Troilus and Cressida (5:3): "They are at it, hark!" [Late 1500s]

at it

Informal

Engaged in verbal or physical conflict; arguing or fighting: The neighbors are at it again.