Abriviation for snap back
Usually found on Snapchat when a user wants you to snap them back

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

It means Snap back, referring to when someone says snap for tbh (to be honest) and they want one back.

in terms of snapchat, sb means ‘snap back’

noun. (pl. same) also,S13
Comes from a Chinese words

Pronounces Sha bi,means "Stupid Bitch".
In fact, Sha = 傻(stupid),Bi = 屄(pussy).
If you play online games in China or chat with some Chinese lowlives you'll see it many times.

SB Means Sidebar. So if they post something they can use "SB" to say something else

South America/Spanish/South Carolina/Southport Beak - a form of cocaine originating from a specific location starting with S - strength may vary according to region