grouser

He is the barking grouser who can be won over by a younger person’s optimistic, higher-pitched spunk.

It’s not all that rare to hear a particularly angry middle-aged grouser hope that Trump wins in order to see the whole system exposed and watch it crumble.

When prompted about the "below the belt" portion of her remarks, the lovable grouser quipped: "Maybe she's referring to her knees."

The gist is that this grouser, John Kosgrove, asked for an upgrade, citing the hassle and delay, and H.P. agreed.

Rooney was nearly 60 when he began his commentaries, so he's going to be cemented in the minds of his audience as—so the popular shorthand goes—a kvetcher, a curmudgeon, a grouser, raising his prodigiously bushy eyebrows in skepticism at a foolish world.