A Lady, Woman or Girl that thinks it's a turn on to fuck all of the british army whilst on a night out. The Squaddy Mattress earn their keep by getting free drinks from the from the unsuspecting soldier in return for back ally action.
by Theblackbridge February 01, 2010
A squaddy mattress is a girl who's slept with more than 5 members of our lovely armed forces. General slag, scally and chav.
by ali November 30, 2004