look up any word, like spook:
 
1.
short for Suck My Big Black Cock
guy: that's not fair!

girl: OH YEA 11 KILLSTREAK!

guy: wooow, you're soo hacking..

girl: no i'm not, SMBBC
by yomama69me February 12, 2011
 
2.
shaking my bbc. for when just shaking your head isnt enough
Slutty girl: I just banged 4 guys at once.
Guy: Smbbc...
by Saflmaster August 30, 2010