(n.) a naughty boy; a bad kid; (appellation) 'naughty boy' / 'bad boy', usually used as a form of address by parents to call one's son (especially when scolding them); 'little rascal', a form of address for someone who annoys you too much; (adjective) to be of not such good character, usually to describe when someone does something which is not so good (morally) or when someone acts in a way that they shouldn't (this can be considered as a toned down version to the adjective '衰格')
Definitions (粵典–words.hk)
名詞
對年輕或者輩份比自己低嘅男人用嘅蔑稱；對同輩使用則表示輕至中度責備，或假裝憤怒，有時用於親暱咁稱呼朋友 a term expressing irritation, anger or mock irritation against a young male or male with from a lower social hierarchy, literally: bad boy
呢個衰仔，由細到大都唔肯讀書，依家個社會冇學歷點揾工？
呢个衰仔，由细到大都唔肯读书，依家个社会冇学历点揾工？
ni1 go3 seoi1 zai2, jau4 sai3 dou3 daai6 dou1 m4 han2 duk6 syu1, ji4 gaa1 go3 se5 wui2 mou5 hok6 lik6 dim2 wan2 gung1? This slacker, who's never liked studying since he was a child – how is he going to find a job with no qualifications?
你個衰仔，做乜咁耐唔揾我？呢排幾好嗎？
你个衰仔，做乜咁耐唔揾我？呢排几好吗？
nei5 go3 seoi1 zai2, zou6 mat1 gam3 noi6 m4 wan2 ngo5? ni1 paai4 gei2 hou2 maa3? Hey man, we haven't talked in a while! How's it going recently?
近義詞
死仔、衰女
Definitions (Wiktionary)
noun, Cantonese
bad kid; bad child (male) (syn.) 衰鬼, 兔崽子, 衰囝