Mostest: A word for idiots who don't know proper grammar.
Mostest could mean something that you like more than you should
-a person I know
Chris: I like this apple the mostest
Gabby: Ya out of all the apples
A person who likes their red pick-up truck and lives on the Blaine County SIde of the GTA V map
Carlos: Look that's Toby over there!
Aiden: Ya, he is in his red pick-up truck again
Toby: Yee Haww