One of Robin’s many exclamations to Batman that starts with “Holy” is legendary. In difficult circumstances, Robin would yell these things, usually followed by “Batman, what do we do now?”
Holy Smokes, Holy Hamlet, Holy Hollywood, Holy Jackpot, Holy Jet Set, Holy Shucks, Holy Cosmos, Holy Iodine, Holy Cold Creeps, and Holy Houdini are just a few of the expressions Robin has used to address Batman.
Burt Ward portrayed Robin in the 1960s Batman television series, and his nasal voice was used to say the “Holy” words. The catchphrases were well-known and frequently used in American slang. They would frequently be directly tied to the story.