Boobstie Share definition Flag A Lesbian best friend to a gay man. One who knows all the secrets, and never judges you for them (well... For the most part). hey gay dude... Is that your lesbian best friend?Gay dude; yeah that's my Boobstie. Boobstie by -JOSHUA- December 31, 2014 0 0 Get merch Get the Boobstie mug. Buy Now — $32.95 See more merch