Top Definition
Definition 1
An extended period of sexual activity, in which the male receives little or no pleasure.

Definition 2
A significant length of time chasing after gash with minimal success.
Damn, I can't believe you licked that girl out for nine hours last night, that must have been a right gashathon.

Damn, Maurice has has been on a gashathon for months now, if only he got some poon he might chillax.
by tarquin08 May 25, 2008
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