1
general::
Phrase(s): in spades
in the best or most extreme way possible; extravagantly. • He flunked the test in spades. • He succeeded at life in spades—honors degree, great career, rich wife, lovely children, and early retirement.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Considerably, in the extreme; also, without restraint. For example, They were having money problems, in spades, or Jan told him what he really thought of him, in spades. This expression alludes to spades as the highest-ranking suit in various card games, such as bridge, and transfers "highest" to other extremes. [Colloquial; 1920s]
American Heritage Idioms