not take (something) sitting down

To refuse to accept something unpleasant, unfortunate, or unjust without resistance, argument, or action. I just found out my wife has been cheating on me for the last year, and I'm not about to take it sitting down! I've been at this job for nearly 30 years and not once have I been given a raise. I'm telling you that I won't take this sitting down any longer!

Common Names:

Name	Pronounced	Usage
Marina	mah-REE-nah (Italian, Spanish, German, Russian), mə-REEN-ə (English)	Italian, Spanish, Portuguese, German, Swedish, Norwegian, Danish, Dutch, English, Greek, Russian, Uk
July	ju-LIE	English (Rare)
Gilberto	jeel-BER-to (Italian), heel-BER-to (Spanish)	Italian, Spanish, Portuguese
Franciszek	frahn-CHEE-shek	Polish
RagnfrÍ&Eth;R	-	Ancient Scandinavian
Kun	-	Chinese