Biden's weird words

• Later, the White House didn't respond when Axios asked what Biden had meant.

Why it matters: Biden’s quirky aphorisms are sometimes weaponized by Republicans to insinuate the 80-year-old president is in mental decline. But Biden has been using unique phrases for years — but even some of his aides aren't exactly sure what he means by them.

Flashback: Biden also said, “God save the queen,” when he was vice president in January 2017, after he certified Donald Trump's 2016 election victory, The Telegraph reported at the time.

• Axios asked several current and former Biden aides what the phrase meant. Several gave different answers and some said they still aren't sure.
• As a proud Irishman whose ancestors probably weren't fans of the crown, Biden may use the phrase more as sarcasm.

Zoom in: Biden has an arsenal of wacky phrases he deploys.

During this year's State of the Union, he told Republican lawmakers, “Lots of luck in your senior year.”

• Some Biden allies believe that's his way of saying, "Good luck with that." But at the time, the White House declined to tell The New York Times what he meant — and some administration officials still chuckle about how they don’t quite know, either.

On the campaign trail in New Hampshire in 2020, Biden sort of jokingly called a skeptical voter a “lying, dog-faced pony soldier.”

• He's claimed in the past that line was from John Wayne, but film aficionados haven't been able to find the movie (there is a 1952 film called “Pony Soldier” but Wayne's not in it).

Bottom line: There are legitimate questions about Biden's age and stamina as he runs for a second term — but his off-beat proverbs are just Biden being Biden.