hilarious

adjective2

1. •
   so funny that people cannot stop laughing

   • Do you like Monty Python? I think they're hilarious.
2. •
   Full of hilarity; merry.

   • Cold Doctor Pell here refused a very considerable fee. He could on occasion behave handsomely; but I can't learn that blustering, hilarious Doctor Rogerson ever refused his. — 1863