know for a fact
Related to know for a fact: known fact
know for a fact
To have definitive knowledge of something. I know for a fact that he cheats in cards! I saw the ace up his sleeve. My mom says she knows for a fact that I'm getting the internship at her company, but I won't believe it until the recruiter calls me.
See also: fact, know
Farlex Dictionary of Idioms.
- known fact
- fact of life
- facts of life
- a fact of life
- as it so happens
- there's no help for (something)
- there's no help for it
- fact
- as it happens
- AAMOF