It's five dehydrated pirates-rehydrated.
5 seconds sound clip from the Batman (1966) movie soundboard.
You can hear this line at 01:08:16 in the Blu-ray version of the movie.
Quote context
[...]
- Yes. You are abrogating my constitutional rights, sir.
- Come on, Penguin. Time to rip off your false feathers.
- Coming, Batman. I am coming at once.
- I wish it were, Robin, but it's not.
- It's five dehydrated pirates-rehydrated.
- At 'em, me hearties! Shiver 'em from stem to stern!
- Attack them, you faltering fink!
- The pirates-they're gone! Popped like balloons! How'd it happen?
[...]