This may ruffle some feathers, but sadly the truth often does.
The terms 'thick,' or its misspelled version 'thicc,' are stupid. Stop using them. It makes the people saying it, especially the girls describing themselves with it, sound uneducated and ridiculous.
It is often merely a synonym for "fat." It has become mainstream in the last ten years or so as more and more people, especially in America, are uncomfortable with calling themselves fat or overweight or obese. The CDC has confirmed for *many years* that Americans are in an obesity crisis. https://www.cdc.gov/obesity/data/adult.html
...Think about it-- if there's nothing wrong with being overweight (even though there is, like extra stress on your joints and extra stress on your pancreas and possible pre-diabetes and being constantly out of breath from even the barest amount of exercise, but let's ignore all that for now) as the "body positivity movement" suggests, then why do people consider it an insult to just be referred to as simply "fat?" No one gets upset at being called "tall," do they? Or "brown-haired" or "slick" or "hale." Even "short" isn't a big deal, as long as you're a girl. So if being fat isn't a big deal, then why are so many people, especially girls, so afraid to just acknowledge their own physique in the simplest terms?
The answer is that it is a big deal because no one actually wants to be that way. If we all had our druthers, we'd all be fit and lean. No one refers to guys as "thick" either... why not? if we're all about equality here? Could it be that... guys simply acknowledge that that body type isn't particularly aesthetically pleasurable to most of the opposite sex?
This is an example of a girl that many people may thusly describe:
She has very nice hair and a nice face, and a really nice rack. I think that many guys would find her attractive, despite not being thin. So herein lies the problem: Is she fat? Well, no, not exactly, but obviously she's not thin either. So what do we call her? Well, people usually would call her thick. Or curvy. But here's the problem-- other girls that truly are just unhealthily overweight have been calling themselves the same things for years, to the point that the term has no substantive meaning any more. This girl ^ may have once been considered "curvy" in a good way, but it means nothing now, because so are the following females, allegedly:
Or they're "plus-sized." Or they're "BBWs." Like... please. Spare us. Stop. A rose by any other name is still a rose. If we call literally every color in the world "red," then colors that truly are red lose their meaning. Red is no longer a color, in that instance-- it's nothing. It becomes intangible and unfocused, like squinting at a giraffe through dirt-smudged eyeglasses on a painfully bright, sunny day and being asked to describe it to a blind person. Likewise, that is what "thick/thicc" and "curvy" are now.
So what's the solution?
Simple: Stop using these terms. Again, if we truly believe that there's nothing wrong with being overweight, then we shouldn't shy from the label should we? Why would we, logically? What I am *not* suggesting here is that people should throw it in each others' faces-- you see a dude who is fat walking down the street, and toss in his his face as he waddles by with "What up, fat?" Noooo, no. That's not the point.
The point is that on GaG or anywhere else online, if someone actually asks for a real appraisal of their looks and weight, you should be honest with them. You shouldn't be malicious or vindictive about it, because what good does that do? It does no good at all. But telling a person who is fat or obese that, hey don't worry you're still attractive, you're not fat you're just thicc, like.... we aren't doing ourselves any good with that. And we should all still be working toward a world in which obesity is eradicated, and we can all live lives that are as healthy and fit as we can make them.
Thanks in advance for your cooperation. Hugs and kisses.