Let's get one thing straight: leggings, tights, which like fishnets, thigh-highs and Spanx, are another category of hosiery. Hosiery is an undergarment. Self-explanatory, no?
Now having arrived at this critical juncture, I will concede to a few instances in which wearing tights as pants is acceptable: namely if you are a dancer, under the age of 12 or wearing a Halloween costume.
Now that we've cleared that up, let's talk how amazing and versatile leggings are on their own merit. You can wear them with a button-down long shirt belted around the waist and ankle boots. Or with flats and a long blazer. This is a sharp and classy look but still very comfortable. It's safe to proclaim that tops should, in almost all cases, be long enough to cover the buttocks when wearing leggings.
Really it's just a Kelly-ism that means Trousers and Leggings combined. I think I used to call them cigarette pants but I
don't think cigarettes are good for you even in a pant! What is also means that a Tregging IS a pant so it is okay to wear these fashionable gems with a shorter top, if you wish. Keep in mind, body type and proportion are essential but most shapes can wear this type of style. I'm pairing mine with a blazer and a pair of lace-up booties!