SYB Share definition Flag 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 bitch syb SYB by bottylusions December 7, 2016 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug