under one's hat en · ADP
Pronunciation
- (Australia) audio
Meanings
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(idiomatic) Concealed; confidential; secret.
The Prime Minister jabbed his cigar at Sir Darius. 'I told you those Holmlanders had something under their hats...."
2009, Michael Pryor, Blaze of Glory, →ISBN, page 98:Orestes Jones kept his real ambitions under his hat until the time struck.
1939, G. M. (Review of General Manpower by John S. Martin)," Time, 30 Jan