Five-Four 

A combination of a normal slap, proceeded by a backhand.
can either be done with singular strokes of each type of slap, or a multiple procession of both actions, back and forth.

hey! come back here, or I'm about to give you the five-four!
(grabs)
*slap slap slap*

Five-Four by GNK June 9, 2009

Five Four Dinosaur

The short girl that always says controversial stuff. She always says to fight her when you can legit punch her across the room. She always gets mad when you call her short and claims to be "average height"

Person: What's up shorty
Five Four Dinosaur: I'm average height *holds up tiny fist* FIGHT ME!!
Person: *grabs her big forehead and flings across room*

Five Four Dinosaur by Linguini Houdini December 11, 2019

Three Four Five 

To drink 3/4 of a fifth.

David: Bro, how much did you drink last night!?
Troy: Dude, I pulled off a three four five.
David: Your were shit faced.
Troy: Fuckk.

Three Four Five by Dwood93 June 28, 2011

four five six 

The SFW version of "For Fuck's Sake"

Boss: Jim, the deadline for the Jenkin's report has been moved up to Tuesday.

You: Ah, four five six!

Boss: What?

four five six by Douche Toilette October 12, 2008

four five

Forty Five caliber pistol, generally the largest caliber (and therefore potentially the most deadly) available in the US.

Man, you hear Fitty Cent got shot 9 times with a four five? He lucky he still walkin!

four five by JMKinMich March 10, 2008

four-five-nine(ing) 

To eavesdrop on someones conversation. Usually with the intention of taking the information for their own benefit. Comes from Penal Code 459 which concerns burglary and theft.

(on the phone) I'll tell you where to meet later. Right now my little brother's four-five-nine(ing)me.

four-five-nine(ing) by rob abbate January 2, 2009

four-five 

When someone gives your fourhead a high five.. they Slap you really hard on the head they yell four-five

Person one: Yo high five mayne..
Unsespecting victim: Yeah Boy

**Person one: Slaps vcitims head and yells FOUR-FIVE BITCH
Victim begins to cry and walks away

four-five by Mary June 17, 2006