SuGoiSuす語彙すGrammar › N2 · 05 Concession and contrast
〜くせに: even though (criticism)
N2 · 05 Concession and contrast
Criticizes someone for doing or being the opposite of what you would expect.
Plain form + くせに (nouns: noun + の + くせに; na-adjectives: 〜な). Has a blaming, complaining tone, so avoid it with people you should show respect to and do not use it about yourself. Compare 〜のに, which is neutral.
Examples
知らないくせに、偉そうに言わないでよ。
You don't know anything, so don't talk like you're important.
子供のくせに、大人みたいな口をきく。
He talks like an adult even though he's only a child.