Noun, a compound of "white" and "Manglish". It is Malaysian English spoken by a white person, including all the slang and intonation used by a fluent Manglish speaker.
"Wankish" has been used to describe an RPG character's alignment ("what's yer alignment?" "wankish" "as opposed to good or evil?"). But more generally, it indicates a general condition of wankery. Similar to wanky.