the sink effect Share definition Flag When flat ass bitches out their ass on the the bathroom sink to make there ass look 100x fatter This bitches ass looks phat as fuck in this pic when she normally flat as fuck. Yeah that's because of the sink effect the sink effect by 18 wheeler February 1, 2018 0 0 Get merch Get the the sink effect mug. Buy Now — $32.95 See more merch