to throw a severe beating to another person or group. Used with mal intent or to beat the ass's of.

A real term used in the heydays of Cocaine frenzy, 70s, 80s. Duff refers to that portion of your cocaine that consists of powder only, usually full of cut or anything else but real cocaine.

v. the act of punching someone in the face.

Scottish slang for a vagina

Also means something is rubbish, crap or broken

the act of locking the door behind you when you arrive to your place to lockout someone who may intrude or barge in unexpectedly.

Designated,ugly,fat friend.

You don't necessarily have to be fat,or ugly to be one. the duff is considered a duff when he/shes significantly less attractive out of the group of friends they hang out with and both boys and girls can be one.
They are often used to get information about his/her friends.

Verb; To smoke marijuana. To smoke weed. Term mostly used in Queens, NY. Originated by the Smart Crew. Sometimes, other constantans substitute the first letter of the word such as "buff, muff, fluff, huff, wuff, etc..."

Noun; Marijuana, weed, etc...