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ummaa (and similar) n. usually used when witnessing of hearing of another's wrong doing. eg Someone drops a glass of milk: "Ummaa, look what you did." a kid might punch another: "Umma, I'm dobbing.", used heaps!!! often by itself usually puts the speaker in a place of authority: they know it was wrong and that knowledge is power. cf. USA, UK, NZ

umpteen n. an unknown (but large) number. UK

USA n. TLA - "under skirt area" USA

up the duff n. a derivation of "in the club" but of unknown origin. c.f. bun in the oven, in the club UK