Mattress Test Pilot Share definition Flag A slut picked up for the express purpose of breaking in a new bed or mattress. I needed to properly break in my new bed, so I went clubbing and picked up a Mattress Test Pilot. Mattress Test Pilot by Charlie Tang July 21, 2005 0 0 Get merch Get the Mattress Test Pilot mug. Buy Now — $32.95 See more merch