What does mosterest mean?

It means more than the most so who ever says this Word automatically wins the argument of who loves someone more! ha!

Actually Mosterestist Means more then that so you would lose the argument in who loves who the most!!!

it would go

"I love you"

"I love you more"

"I Love You the most"

"I Love You The mosterest"

"I love you the mosterestist!"

Technically, "Mosterest" is not a real Word, but rather a made-up Word to keep the game running. Don't ever try to use it on an English teacher or in a real paper, because they will mark you off seriously for it.