Top definition
The new toothbrush you must use to replace your old whacked up toothbrush.
Ryan: Yo homie, im trying to brush my pearly blancas and this old toothbush isn't doing shit!

Ben: Relax bro, we'll take a Newthbrush run to walgreens in 10

Ryan: Maybe I can swipe me an oral-b!
by patbenn August 05, 2011
Get the mug
Get a NewthBrush mug for your Facebook friend Nathalie.