go at it tooth and nail(redirected from they went at it tooth and nail)
go at it tooth and nail
To do something or perform some task with tremendous fervor, determination, energy, or forcefulness. An allusion to the force with which a blacksmith strikes metal using a hammer and tongs. What started as a minor disagreement has escalated into a heated argument, and the two have been going at it tooth and nail ever since. I need to go at this paper tooth and nail if I want to keep my A in the class.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.