YOU thought you had enough to worry about with muffin top, your receding hairline, and that stubborn flab under your arms.

Now meet the 'thut' - the untoned meeting place of your upper thighs and butt.

There should be definition at that spot - a clear distinction where your legs end and your buttocks begin.

But as NYMag points out, that definition can cease to exist when your days are spent sitting at a desk for too long, and you're left with a shapeless sag where there should be a pert little angle.

Chances are, you're not too fussed if your butt drops into your legs.

But if you are prone to aesthetic obsessions like this, fear not. There are exercises to keep a border between your bum and legs.

"Your legs muscles, your quads, hamstrings, calves, and your gluts can all be toned and in doing so you can absolutely create definition so that your butt appears lifted and firmed," fitness instructor Annie Mulgrew told the Daily Mail .

She recommends rowing. Others prescribe squats. And you easily could do these simple workouts at home.

Otherwise, write this off as another nuisance fad and carry on with your lives, folks.

Curvy figures benefit from a contoured waistband.

More From WKFR