side-splitting
Jeffrey can be side-splittingly funny and heartbreakingly dark.
He is a sparkling, often side-splittingly funny writer.
It won't attract huge audiences outside the cities, and it's mildly amusing rather than side-splittingly funny.

SMART Vocabulary: related words and phrases

Humour & humorous
amusingly
bitingly
blackly
bone dryidiom
bring
drily
gag
geddit?
GSOH
jocose
lightly
mordancy
non-serious
pawky
photobomb
photobombing
rib
standing joke
wag
wisecrack

Examples of side-splittingly

side-splittingly
That last scene - where the whole gang comes together over their shared realizations of their failures - is both side-splittingly funny and strangely warm.
From A.V. Club
They laughed side-splittingly over her speeches after every visit.
From Project Gutenberg
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.