triultimate

Third to last. After penultimate.

Ferry Passenger: is this the triultimate ferry?

Ferry staff member: Pardon?

Ferry Passenger: is it the fucking triultimate ferry?

Ferry staff member: what does triultimate mean?

Ferry Passenger: third to last, you thick bitch.

Ferry staff member: oh yes sir. That's correct. There are only two more ferries after this one.

Ferry Passenger: Thanks you stupid cunt