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It stands for you son of a b*txh, it can be used in a friendly way on friends when they are being an irritation and you are in enviroment of families and kids.
sahil called sid ysob because he met ismail without him.
by Exdup December 19, 2020
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Jul 26 Word of the Day
Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed
I got a call from X the other night. She had an extra ticket to a concert she bought for a friend, but they couldn’t make it so she called me to ask if I wanted to go because I am her Second String Friend.
by Deus-ex-machina August 26, 2020
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2
It stands for YOU SON OF A BITCH (YSOB). It can be used to friendly call your friends ysob keeping it safe for the environment and families arround.
Sahil called sid YSOB because he met ismail.
by Exdup December 19, 2020
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3
Your sisters other bestie
I got you this ysob hat it means your sisters other bestie
by Fact checker 112211 November 03, 2020
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