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1.
Someone so obese, they take up two seats on an airplane, bus, or train. Bonus points if said person has to buy two tickets.
My flight to London sucked. I got stuck in a window seat for eight and a half hours next to a two seater.
by frank carter January 25, 2010
 
2.
- a word to describe someone who is too big (fat)

to fit in one airline seat and is forced to buy another seat.

- a word to describe someone who is on the edge of becoming too fat to fly on in a single seat.
You better watch your diet or else you will be a two-seater and fly extra. Well at least you can have have two carry-ons baggage on the bright side.
by Boosh23 December 04, 2009