The highest level of love ever achieved in a relationship of any kind and may not be topped by any other word.
Joshua loves Darion the mostesterest. Goodnight beautiful.
by Jmoon36 June 24, 2016
More than the most, more than more than the most. The absolute most of something that anything can be
Mostesterest means the biggest amount of something, and is used to end an argument with no complaints.

E.g Tiffin said 'I miss you' Ryan said 'I miss you most' Tiffin replied 'Well I miss you the moster' and Ryan concluded with 'No I miss you the mostesterest' and dominated the conversation.
by Teachmehowtodougie January 07, 2015
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