mostestestestestestestest

1. When a determiner that is more intense than ‘mostestestestestest’ is required to reference a noun. It exceeds 4.65 x 10^185 Planck lengths and counting. As well as physics, it is said when one attempts to expresses the mostestestestestest genuine, realest, and deepest affection. It is definately the most anything will ever be and nothing, not even ‘mostestestestestestest’ with another ‘est’ will ever exceed the amount of noun/noun group there is.
2. How much Saffron loves Rudy.

rudy: I love you most
saffron: I love you mostest
rudy: I love you mostestest
saffron: I love you mostestestest
rudy: I love you mostestestestest
saffron: I love you mostestestestestest
rudy: I love you mostestestestestestest
saffron: But I love you mostestestestestestestest

Mostestestest

When a determiner that is larger than ‘most’ and ‘mostest’ and mostestest’ is required to reference a noun to the fullest extent and/or with fullest and realest affection.

rudy: I love you most
saffron: I love you mostest
rudy: I love you mostestest
saffron: but I love you mostestestest.