Top definition
Acronym for Realy Big Fucking Knife, often used in but not limeted to kitchens.
1.
Chef: look out rbfk coming through

washer: ok thanks for the heads up

2.
bob: dude nate, wheres your car?

nate: last night a guy came up to me, pulled a rbfk and told me to get out of the car so, i did.

bob: why didn't you fight him?

nate: he had a rbfk i wasent about to fuck with him!
by NateD. March 07, 2008
Get the merch
Get the rbfk neck gaiter and mug.
Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
Get the merch
Get the jabbed neck gaiter and mug.