sack up v. to become bold, courageous, or forthright; to nut up, man up. (source: Double-Tongued Dictionary)
Further reading
If you mistype something, that’s a typo. But what do you call it when your voice-to-text program mistypes as you’re dictating? Is that a mico, as in microphone? Plus, the word sycophant has a long and surprising history that goes all the way back to...
Gossip goes by many names: the poop, the scoop, the lowdown, the dope, the scuttlebutt, the 411, the grapes, the gore, and hot tea. Plus, John Donne’s love poems are among the greatest in the English language, even as they’re famously difficult to...