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A person who is particularly partial to the Sesh. Generally found in odd numbers as the voice of reason needs to be overruled when pondering whether to continue the sesh or return to normal life. Sehmonsters often refer to a prolonged Sesh of 3 days or more as "holidays" and can be observed trying to persuade non-Seshmonsters to join in on these "holidays", often resulting in loss of employment.
"That lad is a wild seshmonster"
by Seshmonster1990 May 05, 2017
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