G Affairs (Chinese: G殺) is a 2018 Hong Kong thriller film directed by Lee Cheuk-pan and produced by Herman Yau. Starring Hanna Chan, Chapman To, and Huang Lu, the film centers on a young girl (Chan) who faces bullying at school due to the online exposure of her corrupted cop father (To) and the social status of her prostitute stepmother (Huang).

Conceived by Lee Cheuk-pan in 2012, the film was stuck in development hell due to a lack of investment, as the story was deemed unsuitable for the Chinese market. After Kurt Chiang came on board as the writer and completely rewrote the screenplay in 2016, the film was selected for the First Feature Film Initiative. Pre-production lasted for a year, with filming commencing in December 2017 and wrapping up in February 2018.

The film premiered on 16 November 2018 at the Hong Kong Asian Film Festival, and was theatrically released in Hong Kong on 14 March 2019. It received six nominations in the 38th Hong Kong Film Awards and was named Film of Merit in the 25th Hong Kong Film Critics Society Awards.