That story doesn't have an 'ounce' of truth in it. [=that story is completely untrue]
She doesn't have an 'ounce' of fat on her body. [=she is very thin]
If you had an 'ounce' of common sense, you wouldn't try it.
(..) All right. Shoes. Give them here. I told you, Diesel, we ain't holding any... - We shot it all. - Yeah? - Shot an ounce in a day and a half? - Yeah. All right, tell you what. Both of you pull it out of your butts right now... ...or I grab a flashlight and (..)2009 TvShow: Breaking Bad Title: Peekaboo Season: 2 Episode 6