Branch finds Poppy, unconscious and cocooned in webbing, and promptly cuts her free and resuscitates her by using a pair of bugs as if they were defibrillators. It's how Poppy jumps back from unconsciousness that raises a few chuckles.
Most of the wild animals featured in the movie are so out-there and weird, they're pretty much all worth a chuckle.
Biggie tells everyone that that Mr. Dinkles is freaking out, only for Mr. Dinkles to show no reaction and make his normal squeak noise.
On Bridget and King Gristle's date, they both reach for the same slice of pizza, and their hands touch. Romantic music starts swelling, their eye contact grows more and more nervous as they lean in towards each other...and then Bridget slaps his hand and rips the pizza slice away before he can take it. Gristle is into it.
Bridget:(audibly gobbling pizza while glaring at him)
Immediately afterwards, Poppy attempts to feed Bridget a complement to give back to Gristle. Poppy can barely hold her gaze on the guy without gagging.
In nearly all of the Trolls fanfictions by George Beard 4, Most of the trolls say sheet instead of...s###
This example is more Black Comedy, but when Branch finally reveals why he refuses to sing because singing indirectly caused the death of his grandmother, Poppy apologizes for having the wrong idea about the reason behind it. What was her wrong idea? She had thought it was because Branch "had a terrible voice."
Even better, Branch admits he had an amazing voice "like an angel" and the scene has fun blatantly playing up his (and therefore his actor's) singing prowess.
After the song "True Colors", Branch admits to Poppy that he's finally truly happy. Poppy's expected reaction is to be overjoyed... and is then followed by a tired "NOW?"
During the Bergens' rendition of Gorillaz' "Clint Eastwood", a Bergen can be seen burying himself in a grave. Looking closer, one can see that his gravestone reads "RIP Here Lies Me". And there's a frog-chicken perched on the gravestone, cawing.
As soon as it's revealed that Creek betrayed the trolls, Branch tries to strangle him with his hair and accuses him of selling them out. Poppy tells Branch to stop and tries to listen to what Creek has to say. Creek then confesses that he did sell them out, and Poppy tries to strangle him with her own hair, with Branch smiling proudly at her.
When Chef shows up in Gristle Jr.'s castle after being gone for twenty years he asks her if she'd been hiding behind a plant the whole time.
The moment Mr. Dinkles actually says Oh snap. In a deep man-voice and then everyone gasped when they hear it, only for Mr. Dinkles to go back to his squeak noise immediately after.
After the gang finds out Creek is alive, they cheer and Branch attempts a "happy shout" with the others. He's a TAD out of practice.
At the beginning of the movie, Chef gives a young Gristle Jr. what the audience is led to assume is baby Princess Poppy. Eventually, they realize Gristle Jr. had been chewing a decoy all along - and it resembles the original Trolls doll!
When the trolls try to comfort Bridget, Biggie tells her to just go ahead and have a good cry, only after she does he tells her to pull it back in.
The deleted scene of Satin and Chenille giving Poppy dresses for her coronation back when it was to play a larger part in the film.
Poppy: I want to wear them ALL!
After Chef starts snatching up Trolls, Biggie asks around if anyone has seen Mr. Dinkles, who's attached to his back. Shortly after, King Peppy's method of dealing with the Bergen is to whack her in the foot yelling "Bad Bergen! Bad, bad Bergen!"
The trolls attempt to give Bridget an idea for a compliment to say to King Gristle. Hilarity Ensues.
This line from Creek after his deception is revealed:
Creek: I had a spiritual revelation.... I DON'T WANNA DIE!