dirty bev Share definition Flag After sex you go to the bathroom and find there is no toilet paper so you use the closest hand towel and put it back after wiping. I pulled a dirty bev this morning; after sex I went to the bathroom and there was no toilet paper. dirty bev by tailslap September 9, 2015 0 0 Get merch Get the dirty bev mug. Buy Now — $32.95 See more merch