Irji (noun, pronounced /irʒi/ or alternatively /irdʒi/) means an incredibly cute girl. In addition to her innate cuteness, an "irji" possesses a witty sense of humour, that manifests itself suddenly and without warning. Overall the coolest female ever.
The adjective derived from "irji" is "irjisome".
Person A: I met a girl, called Charlotte, last night. She was sooo irjisome, man...
Person B: Oh, I know her too. Yep - a total irji that girl.