When someone is by themself, and to pass time, jerks off as many times as possible in one day.
Dharshan:Chris you look so tired today. What happened?
Chris:Well, I was up all last night.
Dharshan:Chris! You gotta knock it off with all these midnight jerkathons!
A Day spent watching films featuring Jared Leto.
A Jarathon is only a Jarathon is there are Five or More Jared Leto Films Being Watched. Any less than Five Is called a Letofest.
"hey...fancy a Jarathon?"
"HELLL yes! Do we have enough films?"
"ummmm, no...we'll have to have a letofest instead."
a person who acts like a jeb; may act stupidly however has plenty of potential and is also very hot, they also act with the intelligence of an 8th grader. He is very narcissistic also.