The word "腻歪" is formed by combining "腻", meaning greasy or fed up, with "歪", meaning crooked or deviant, to express a state of excessive annoyance or cloying disgust, often resulting from overfamiliarity or distorted sweetness.
Word Definition - 腻歪
nì wai(of a couple) to be sweet to each other; lovey-dovey; tired of; fed up with; sick of (synonym of 膩味|腻味[nìwei])