Seanathon

As it would seem, a "Seanathon" is quite the endurance to be around for long periods, and if that wasn't enough, they eat people for sustenance!

Man, I'm working Yano, doing my regular job, and then this guy named Sean starts. WHAT A SEANATHON they are to work with!

Nothing.

Jeez, he's a real Seanathon to be around.

Isn't your brother's name Sean? Your life must have been a real Seanathon growing up. Surprisingly, you have yet to get eaten.