either do or die
verbEtymology An ultimatory verbal phrase composed of the words: either, do, or, and die.
1
Idiomatic To act with sufficient urgency to result in either immediate success or immediate failure.
- Emanuel: Bless us, dear Fortune! / Armusia: Let us be worthy of it in our courage, and Fortune must befriend us. Come, all sever; but keep still within sight: when the flame rises let's meet, and either do or die.1621 (first literary attestation), John Fletcher, The Island Princess act 2.scene 2