Dictionary

in thunder en · ADP

Meanings

1. (idiomatic) An intensifier, chiefly used with questions.
   • At the time, however, I was only peevish, wondering what in thunder went on, for I had been in the place long enough to know that, next to the matron, the clock is the most sacred thing in a hospital. 1951, John Wyndham, The Day of the Triffids, Harmondsworth: Penguin Books, published 1954, page 7:

Forms