hold all the aces

Also, hold all the trumps. Be in a winning position, as in We can't argue with Jeff; he holds all the aces, or If Jean refuses, he'll reveal that he holds all the trumps and force her to give in. These expressions allude to card games in which the ace or a trump card outranks all the others. Also see play one's cards right; trump card.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.