v. To brag less than usual.
2015
Downbragging: Bragging about how much you saved, or didn't have to spend, on vacation. Done so that you don't seem to be spending profligately during hard times.
2015
To uphumble and downbrag, 1) I'm saying I was wrong and 2) Kurt's tennis >>>> Carl's tennis
2012
Lots of humor and downbragging here #SS19
2010
It would appear we've gone from downsizing to what can only be termed as downbragging: "We're really struggling — I can't remember our last Ocado delivery." "Well, this season's Boden catalogue went straight into the bin." Cue the tiniest, squeakiest violins in the world.
2007 (earliest)
Postscript: That'll teach me to downbrag!