To throw down the gauntlet

Also found in: Idioms.
Related to To throw down the gauntlet: pick up the gauntlet, threw down the gauntlet
to offer or send a challenge. The gauntlet or glove was thrown down by the knight challenging, and was taken up by the one who accepted the challenge; - hence the phrases.

See also: Gauntlet

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Micawber has to do, is to throw down the gauntlet to society, and say, in effect, "Show me who will take that up.
Speculation is that Trump may try to throw down the gauntlet in tonight's 21 ET speech.
"They've decided to throw down the gauntlet and have challenged the core staff team to cycle - on display in Liverpool city centre - for 24 hours."