2ou múhn fùng sin 澳門風扇 — very irritating, very annoying, a pun based on the resemblance between the Cantonese speaker's pronunciation of the English phrase "Macau fan" and màah gāu faahn 麻閣頻 ("fucking annoying"), so that in saying ou múhn fùng sin 澳門風扇 one is referring indirectly to the obscene phrase màah gāu faahn 麻閣頻 "fucking irritating" via the harmless intermediary of "Macau fan".
3ou méih gāa 澳美加 — [Omega] a pun between the watch brand-name and the names of the countries (ou 澳 "Australia", méih 美 "America", gāa 加 "Canada") to which Hong Kong people typically emigrated in the late 1980s and 1990s.
4ou múhn gāai 澳門街 — [Macau street] Macau, the streets of Macau, the street-life of Macau (hgfw).