go at it
go at (someone)
1. To physically attack someone with great ferocity or hostility. Watch out for that bull in the back field—he'll go at you if you get too close. John went at the burglar with a knife to defend his family.
2. To criticize, berate, or verbally harass someone at length and/or with great intensity. At the international summit, the foreign ambassador went at the president, demanding an explanation for the recent espionage allegations.
go at (something)
To engage in or undertake something with great energy, enthusiasm, or vigor. I'd been going at the report for two days straight when my computer suddenly crashed and wiped out half my work!
go at it
1. To engage in or undertake something with great energy, enthusiasm, or vigor. I think you need a break from that assignment—you've been going at it for the last three hours! When John returned to teaching, he went at it with a renewed sense of purpose and excitement.
2. slang To engage in sex. I can hear my neighbors going at it almost every night—it's so embarrassing!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.