Top definition
"Not in THIS house" is a phrase used to let someone know that whatever they're doing/saying is highly inappropriate. Often used in a joking manner.
Tommy is saying goodnight to his girlfriend at his parents house. An act which his parents mistake for him having sex. His mom pulls him aside and yells "Not in THIS house!"

John: "Dude your sister is so hot!"
Jack: "Not in THIS house!"
by jdizzledinmypants January 17, 2009
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