It's kind of a theme dealie.
2 seconds sound clip from Darkwing Duck - Life, the Negaverse and Everything (S1E35).
You can hear this line at 00:03:50.464 in the DVD version of the TV Series.
Quote context
[...]
- Oh, my gosh! The Fearsome Five... Four! I gotta get DW.
- You know the Dacians were the last civilization conquered by the Romans?
- Gee, Honk, you sure know how to cut loose on the ole B-day.
- All ashore! Welcome to Pelican's Island.
- It's kind of a theme dealie.
- Oh, oh, oh, I wonder what is cooking under this primitive barbecue. Look! Coconut burgers!
- Wow, Herb. This is really great.
[...]