pillow fight(n = noun.act) - a child's game of fighting with pillows;
is a kind of child's game

bed pillow, fight, fight back, fight down, fight off, fight shy, gang fight, knife fight, long pillow, pillow, pillow block, pillow lace, pillow lava, pillow sham, pillow slip, pillow talk, proxy fight, sea fight, street fight, throw pillow