ACE UP ONE'S SLEEVE (OR N. AMER. IN THE HOLE)


Meaning of ACE UP ONE'S SLEEVE (OR N. AMER. IN THE HOLE) in English

ace up one's sleeve ( or N. Amer. in the hole)

something effective kept in reserve.

→ ace

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.