cardinal sin (noun) mortal sin: unforgivable sin
Sinonime: back, backside,
beam,
behind, breech,
bum*,
butt, butt end, buttocks,
can*, croup, derrière, duff, fanny, haunches, hind end, hindquarters, keister,
moon*, prat,
rear, rear end, sacrum,
seat, tail end, tail, tush