Top Definition
Syb
Significantly Younger Being. Another term for LG's
Check out those SYBs yo! They're smokin!
by kitkatnutellafiend February 14, 2012

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SYB
An acronym for "See You Bye" which is another phrase for goodbye.

Used at the end of a message to let someone know you're leaving
"I'm going to play the piano SYB"
by possum pocket January 08, 2017

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SYB
SYB means steal your bitch, the is basically steal someones girl. when a girl has a man and you want you or when you talkin shit to another dude
by bottylusions December 07, 2016

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SYB
abbreviation for suck your balls. Alternative: SMB, suck my balls.

Comeback.
Person 1: You totally suck at life
Person 2: SYB
by Dopico July 14, 2010

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