Dirty Boab, aka the Rusty Crumble is the act of shoving your penis between the buns of a rustler burger and masterbating until the bun crumbles away and your left with a penis covered in rustler crumbs
Dirty boab came to fruition when Boab sent a video of him Rusty Crumbling to Lauren
by drinker14 April 7, 2020
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