Comical corruption of "fuckin' tremendous!". Used for fun, or when use of the actual phrase out loud would be inappropriate.
"You missed last night's piss-up, man! Oh, meckin' tre-FUN-dous!!!"
or
"Whoa, your new girlfriend has one meckin' trefundous ass, dude."
or
"Whoa, your new girlfriend has one meckin' trefundous ass, dude."
by Uncle Al, the Perv's Pal August 26, 2005
Get the Meckin' Trefundous!mug.