tail

See:

a sting in the tail be bright-eyed and bushy-tailed be chasing tail be like a dog with two tails be on tail Better be the head of a dog than the tail of a lion bright-eyed and bushy-tailed can't make head nor tail of can't make heads or tails of come up heads freeze tail off

get ass in gear get off tail has the world by the tail have a tiger by the tail heads or tails in two shakes of a lamb's tail make heads or tails of nose to tail not able to make head or tail of on coat-tails on tail

tail after tail between legs tail off tail wagging the dog the tail end of the tail wagging the dog turn tail two shakes of a lamb's tail with tail between legs work tail off