Literally Léirén That’s 雷  Leí Thunder Shock Surprise

雷 

leí

Literally “thunder.” Used to indicate shock or surprise or outrage (or any emotion that might be represented by the image of someone being thunderstruck). Moreover, on both the Internet and in real life 雷人 léirén (lay ren), literally “thunder person,” has come to mean “outrageous” or “shocking” or “absurd.” One especially common expression is 太雷人了 tài léirén le (tie lay ren luh), meaning “too outrageous” or “that’s so stupid” or “that’s insane.”