SMB 

Word used as an acronym in texting for "Shakin'n My Butt" also known as Twerking. Like SMH: Shakin' My Head.

Guy: This song is good

Girl: It's not just good, it's lit! SMB

SMB by Johnny M123 July 7, 2016

Smb 

Sad bitch moment

Zoe: cries

Me : she’s having a smb ( sad bitch moment )

Smb by Depressed bih June 30, 2019

SMB 

"Snap me back"

This is used to tell someone you wish to chat with them over snapchat.

It can be used on snapchat or anyone else.

"Hey when you get a chance smb because I wanna talk." or "smb when you wake up."

SMB by hey-buddo July 6, 2017

Smb 

an abbreviation for Scratching my balls is a common element of Internet slang. It was used historically on Facebook but is now widespread in other forms of computer-mediated communication It is one of many initialisms for expressing bodily reactions inspired by smh(shaking my head) or (scratching my head) or which ever you prefer

for example:

JOHN: wats up

Rich: nothing much

JOHN: you going to the party tonight?

Rich: uh SMB Probably not

JOHN: Lol smb

Smb by Oreo N/p April 18, 2010

Smb 

SUPER MARIO BROTHERS!!!

dude1-Let's Play SMB
dude2-OK! I call luigi!

Smb by cr2purple August 6, 2011

SMB 

stands for Speed MasturBation

Man, last night I prank called QVC asking for SMB lubricant and the guy responded, "You should already have that sir."

SMB by Sarkon July 14, 2004

smb 

smoke mad bowls

After school were gonna smb in my car.

smb by sammyyyy09 May 7, 2011