pump out Share definition Flag 1.to produce or mass produce a product. 2.to pump a liquid out of an area. 1.i'm planning on pumping out a new clothes-line 2.captain: pump out that water before we sink! skipper: aye, aye! pump out by Zebra5000 September 2, 2008 0 0 Get merch Get the pump out mug. Buy Now — $32.95 See more merch