| Ugg boots (n) (also spelled Ugh) |
slip-on casual boot made of fleecy sheepskin |
| Uluru (n) | Ayers Rock Aboriginal name for the huge red rock in the center of the country. |
| Uncle Chester (adj) | child molester |
| unco (adj) | uncoordinated |
| undercroft (n) (adj) | split-level home: garage below, living areas above area under main floor of a building, with it's own entrance |
| undercroft parking (adj) | parking on ground level with living, working areas above |
| underdaks (n) | underwear |
| uni (n) | university |
| up himself (adj) | inflated ego, also "head up his ass" "He's up himself." |
| up the duff (adj) | pregnant |
| ute (n) | flatbed pickup truck Short for utility. |