Moster

A word you use when you're debating something and they say most or mostest

Boy: I miss you more
Girl:I miss you the most!
Boy: I miss you the mostest

Girl: I miss you the mostER

Moster

When you're having a debate with someone and they say most and you say moster.

Boy: I miss you more
Girl: I miss you the most
Boy: I missed you the mostest
Girl: I missed you the moster