keep sth under one's hat イディオム
keep sth under one's hat
Idiom(s): keep sth under one's hat
Theme: SECRECY
to keep something a secret; to keep something in one's mind (only). (Informal. If the secret stays under your hat, it stays in your mind. Note the use of but in the examples.)
• Keep this under your hat, but I'm getting married.
• I'm getting married, but keep it under your hat.
keep sth beneath one's hat
Idiom(s): keep sth beneath one's hat
Theme: SECRECY
to accumulate article a secret; to accumulate article in one's apperception (only). (Informal. If the abstruse stays beneath your hat, it stays in your mind. Note the use of but in the examples.)
• Accumulate this beneath your hat, but I'm accepting married.
• I'm accepting married, but accumulate it beneath your hat.
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