A term used to refer to someone who is so obese that their
enormous ass is too large to fit in one seat, and must therefore occupy two, usually achieved by awkwardly straddling the armrest. This person
is considered to be wearing
an armrest thong. See also: Assassination
Obese man: Do you have anymore seats available for this
Receptionist: We do... but you'll have to wear
an armrest thong.
Stewardess: Al Roker was sitting there the last trip.
Guy: In which seat?