In the "Jujutsu Stroll" short at the end of episode 5 "Curse Womb Must Die—II—" (Transcription: "Jutai Taiten—Ni—"; Japanese: 呪胎戴天—弐—), Zenin Maki asks Fushiguro Megumi and Kugisaki Nobara to confirm whether or not Panda is stinking. Both oblige by sniffing Panda, and Megumi announces that Panda smells like the sun. The subtitles I have seen (on Netflix) specifically are:
It doesn't stink, but it smells like the sun.
Maki and Nobara are then shown to have a shocked, slightly blushing reaction to Megumi's words, repeating his words mentally, as "O-hi-sa-ma?!"
Google Translate tells me that "Ohisama" indeed means "sun", so the subtitles aren't incorrect, but... Is this an odd expression to use in general, and is this what prompts Maki and Nobara to react the way they do? I'm sure I'm missing some context hidden in the Japanese language here.