As compared to that, Israel/Palestine is old hat, and at most a peripheral irritant.
Basquiat, in turn, seemed to make Warhol relevant again—he was an old hat at this point, his work increasingly out of vogue.
Even if the rhetoric of urgency is old hat, the context for it is not.
I gave the native a blanket and some biscuits and the mate gave him an old hat.
It appears that the man wore an old hat of mine, which he lost in the storm.
He looked at a vigorous clump of hair at the top of the official's head, then down at his old hat indifferently.
How long he must wear the old coat or the old hat before they get him a new one!
But at last it was ready and packed into an old hat box belonging to Mops, the Scarecrow's cook.
That is to don storm rubbers, raincoat and an old hat, and defy it.
Lilly still sat on the couch on which she had come back to consciousness, twirling her old hat without a thought in her brain.
"out of date," first recorded 1911. As a noun phrase, however, it had different sense previously. The "Classical Dictionary of the Vulgar Tongue" (1796) defines it as, "a woman's privities, because frequently felt."
Obsolete, old-fashioned: “Get with it, Murray; your methods are strictly old hat.”
Out of style; old-fashioned: Tubular stuff is now old hat (1911+ British)