To like/love someone or something so much that you can't use the word "most" to describe it; more than most.
Girl: I love you.
Guy: I love you more.
Girl: I love you most.
Guy: BET! I love you mosterestestest!
Girl: shit you win.
by kidulring August 15, 2017
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A greater version of most; more.
Guy: I love you!
Girl: I love you more!
Guy: BET!! I love you mosterestestest!
Girl: Shit you win.
by kidulring August 15, 2017
Get the Mosterestestest mug.