against (one's) principles(redirected from against their principles)
against (one's) principles
In opposition or contrary to one's values or beliefs, such as those of religion, ethics, or ideology. I'm afraid it goes against my principles to vote for a measure that would limit funding for public schools. He told me it's against his principles to drink alcohol.
See also: principle
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.