Green’s Dictionary of Slang

could it be Satan? phr.

[the catchphrase of the Church Lady (played by Dana Carvey), in the TV show Saturday Night Live]

(US campus) a reaction to something seen as naughty.

Show quotations
[US]Eble Campus Sl. Spring.
Shrubbery Dec. 🌐 As The Church Lady would say, ‘Could it be SATAN?’.
[US]Bubba’s of America 🌐 Church Lady’s Oh’ficial Site. The Church Lady Herself!!! And Who Is That Below Me???? Could it Be? SATAN???