not for nothing phrase2 •Not for no reason; not without reason; (often) for a good reason.Not for nothing did he wait until a moment when Mommy wasn't home to ask for Daddy's permission to watch an R-rated movie. •Used to soften the impact of what is said next, implying that it is worthwhile or important.A: It's ridiculous how much they charge for insurance premiums around here. B: Not for nothing, when one out of four homeowners in an area has filed a claim within the past five years, premiums aren't gonna be cheap.