Quite simply a mixture of a minger (someone who fell out of the butt ugly tree and hit the sphincter on the way down) and a fucktard (someone who isn't retarded, but who is so stupid/annoying/idiotic, that they sure do appear that way.)
Not only was that barmaid as fat an ugly as a hippo, she couldn't even subtract 4 from 10. What a mingtard!
Mingtangi Day is a day that is reserved for the asian society of New Zealand, Much like the New Zealand holiday waitangi day on which the native inhabitants (The Moari) sit around drinking cheap beer and complaining about the white people stealing their land of them. On Mingtangi Day things are much the same. The Asian inhabitants of New Zealand sit around on the floor and eat sushi, occasionally snort wasabi but mostly complain about the whit people not letting them steal their land and laughing at their bad driving. Mingtangi Day is normally one day after Waitangi Day, this means all the non asian or maori people dont have to put up with the complaining for more than two days a year.