(英文) (of weather) sometimes cold / chilly, sometimes hot / warm; used to describe a drastic swing in temperature
呀！ (gam1 go3 sing1 kei4 tin1 hei3 fat1 laang5 fat1 jit6, jiu3 siu2 sam1 san1 tai2 m4 hou2 sip3 can1 aa3!)
(英) Temperature swings from cold to hot this week. Take care and don't catch a cold.
(英文) used to describe any frequent change in attitude towards another person or something; being warm, friendly, passionate sometimes, but other times cold, distant, indifferent
(粵) 佢對我忽冷忽熱，我都唔知佢係咪鍾意我。 (keoi5 deoi3 ngo5 fat1 laang5 fat1 jit6, ngo5 dou1 m4 zi1 keoi5 hai6 mai6 zung1 ji3 ngo5.)
(英) He is sometimes passionate to me but sometimes cold to me, I don't know whether he loves me or not.