What does it mean to be “thick”? Am I “thick” or just fat?

This year I’ve been seeing more and more people wishing to be “thick” instead of thin, which is a first for society. I’ve seen everyone be labeled as “thick” from fat 250 pound women to slim 115 pound women, so what qualifies one to be ““thick””?
Also, would I fall under the chubby, thick, or fat category? Be brutally honest. I need motivation to get off my ass and exercise anyway.
I am 5’5 and 140-145 pounds. I gained 20 pounds this year from being a lazy college freshman.
What does it mean to be “thick”? Am I “thick” or just fat?

What does it mean to be “thick”? Am I “thick” or just fat?

What does it mean to be “thick”? Am I “thick” or just fat?
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