No-No

The word every elementary school librarian uses to describe what you should or should not do with the books.

Librarian: Kids, taking a piss in the books is a big no-no.
Kid: Bu-
Librarian: NO. NO.

by LamarBrames December 12, 2019

No-No

A No-No refers to a perfect game thrown by a pitcher in baseball. NO hits, NO walks. It is commonly misused to refer to a no hitter in which walks were allowed.

Roy Halladay threw a No-No in the 2010 postseason. He is still a loser for being a Philly though.

by Baseball Expert May 08, 2011