It's for a fact

It's for a fact.

Rur. It is true. Charlie: I can't believe that Bill's selling his house. Tom: It's for a fact! It's for a fact that chocolate is poison to cats.
See also: fact, for
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also: