What does "sidesplitting" mean?

Exceptionally funny; hilarious.

What is a synonym for "sidesplitting"?

Common synonyms include: funny, hilarious, killing, side-splitting, uproarious.

adj

adj ·Rare ·Advanced level

Adjective

1
Exceptionally funny; hilarious. idiomatic
"We saw a sidesplitting film last night."
2
Of laughter, intensely uncontrollable and genuine. idiomatic

Adjective

"We saw a sidesplitting film last night."

From side + splitting.