The practice of substituting one's friends for their own genetic siblings. May be due to geographic or emotional separation. Sometimes this practice is colloquialized as a brother from another mother BFAM.
Steve's brother couldn't make it to the game, so he made a last minute sibstitution with his friend Mike. Stacy sibstituted her friend Becca, because her sister lived 12 hours away.
by BiochemDude June 14, 2016
Get the Sibstitution mug.Siobhan means Perfect. Perfect in all ways. Hot, sexy and the girl everyone wants to be.
A girl named Siobhán is often very sassy and attractive...often surounded with boys.
A girl named Siobhán is often very sassy and attractive...often surounded with boys.
You can not be perfect because your not Siobhán.
Dude 1. Look at that girl...she's stunning. I'm gonna ask her out for at date.
Dude 2 Hey she's not in your class and I'm pretty sure she already has everyone all over her face..
Dude 1. Look at that girl...she's stunning. I'm gonna ask her out for at date.
Dude 2 Hey she's not in your class and I'm pretty sure she already has everyone all over her face..
by Hufflepuffle123123 December 13, 2016
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siobs
• siobhán
• Slobster
• sibster
• soobsexual
• sibsborg
• Sibship
• Siobhain
• siobhan cole
• slobshock
by hslave2 April 3, 2018
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by sjmason July 14, 2018
Get the Soobs mug.by All_American_Rich July 15, 2018
Get the Slobster mug.by Sparkhao February 18, 2020
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