mattress folder Share definition Flag When they fuck you so good you grab onto the mattress and bend it...in a sense folding it Bro my girl is so good in bed. Really mattress folder good?? Hell Ya she is a mattress folder. mattress folder by shyvanismommy July 3, 2016 0 0 Get merch Get the mattress folder mug. Buy Now — $32.95 See more merch