General:
* A tickle in the ribs: This metaphor evokes a physical feeling of amusement.
* A spark that ignites laughter: This emphasizes the sudden, powerful nature of humor.
* A smile that spreads like wildfire: This metaphor highlights the contagiousness of laughter.
* A burst of sunshine on a cloudy day: This suggests humor brings light and joy to a situation.
* A delicious bite of unexpected sweetness: This metaphor highlights the delightful surprise of humor.
Specific types of humor:
* A razor-sharp wit: This metaphor describes sharp, clever humor.
* A slapstick symphony: This metaphor evokes the physical and chaotic nature of slapstick comedy.
* A dry, deadpan delivery: This metaphor emphasizes the understated humor of dry wit.
* A playful punchline: This metaphor highlights the playful and surprising nature of a joke.
* A laugh riot: This metaphor emphasizes the sheer volume and intensity of laughter.
Beyond metaphors:
You could also use similes to describe humor:
* Funny as a barrel of monkeys: This compares humor to the chaotic energy of monkeys.
* Funny like a clown: This compares humor to the playful and amusing nature of a clown.
* Funny like a stand-up comic: This compares humor to the professional and entertaining style of a stand-up comic.
Ultimately, the best metaphor for funny will depend on the specific type of humor you're trying to describe and the tone you want to convey.