sheefer Share definition Flag the head of a beer. The last couple sips of beer in a can. When it's a tad warm. =---Dude, pour your fucking sheefer out man, it's gross. --- Let's combine the sheefers and make the pledge drink it!! sheefer by xsfcsknj August 27, 2010 0 0 Get merch Get the sheefer mug. Buy Now — $32.95 See more merch