Noun: Basically a girl or guy that is larger that of your liking. If the subject is thicker than your standards...then they are a thicker.
This word is also unique in the fact that instead of a negative connotation, it can be a positive tag. If you like the fattys that is, roll in that dough...ect.
* These videos are coming directly from Youtube, they may or may not be most relevant to the word "Thicker"