Top Definition
A booger (dried nasal mucus) that gets hard and sharp enough to stab or cut the inside of your nostril. It can result in pain and sometimes a nosebleed.
"Dude your nose is bleeding, what's wrong with you?"

"The low humidity today gave me a really bad knife booger and it cut me when I was trying to pick it out."
von SR20DEN 24. Dezember 2009
5 Words related to Knife Booger

Täglicher Gratisnewsletter

Gib unten deine Mailadresse ein um jeden Morgen gratis dein "Urban Wort des Tages" zu bekommen!

Die Mails werden von versendet. Wir versenden keine Spammails.