"NEVER — INSULT — ALBUS — DUMBLEDORE — IN — FRONT — OF — ME!"
Ron's response, upon seeing that the congratulatory letter Percy sent him also included an advice to sever ties with Harry, was to tear the letter into bits before throwing it into the fire, muttering as he did so:
“And do you know why? Because—” He puckered his lips again. “—because it is: So Nice! . . . And so you see I ask for very little of My Angels.”
A Death in the Family: A discussion about death leads to six-year-old Rufus asking his mother Mary about his pet rabbits that were mauled by dogs, which leads to a question about why God lets people do bad things. Mary finds herself outpointed on logic so she finally falls back on more or less arguing that God is a troll.
"God—doesn't—believe—in—the—easy—way," she said, with a certain triumph, spacing the words to give them full emphasis.
On the Discworld, multiple exclamation marks are a sure sign of a diseased mind:
In Thud!: That! Is!! Not!!! My!!!! Cow!!!!! Those who haven't read the book will probably snicker. Those who have read the book will shiver.
Also in Maskerade, everyone!!!! Takes!!!! Such!!!! A!!!!! Long!!!!! Time!!!!! To!!!!!...
Hogfather: And that leaves us with one final question. Have you been naughty... or... nice? Ho! Ho! HO!
Men at Arms: Silas Cumberbatch, a new recruit to the Watch, speaks this way. Justified in that he's a former town crier.
A Hat Full of Sky: Part of Granny Weatherwax's rant. "That is the root and heart and soul and center of witchcraft, that is. The soul and center! The... soul... and... center!"
Although Not With The Same Intensity, All Of The Golems Of Discworld Are Implied To Speak Like This All The Time.
"I. Am Not. Yoda." The titular character has just exploded a rubbish bin out of sheer rage at his stubborn, mouthy, disobedient and-at-risk-of-the-dark-side apprentice, who also complained about an assignment and tried. It's a proper danger sign when Harry won't even be placated by pop culture references.
"Fuego. Pyrofuego! Burn!"
Also seen in the final battle in Changes, in a duel of wills between Kukulcan, the Red King, and Harry.
Another Dan Abnett Horus Heresy novel, Know No Fear, features this for the speech of one of its characters, Telemechrus. Slightly inverted, in that he is a Dreadnought (Giant Mech containing the mortally-wounded fragments of a Space Marine hero) and it represents the machine systems processing his speech.
In Paper Towns, Margo says to Quentin, "I. Will. Miss. Hanging. Out. With. You."
Not with punctuation marks, but toward the end of the second book of Taylor Anderson's Destroyermen series, the destroyer Walker tries towing a much larger ship to safety. That cuts their speed severely, the enemy's guns are getting the range, and they can't maneuver to dodge. The engineer tells the captain they don't have enough fuel, the Bosun tells the captain it's no use, and the captain says, "We Are Not Leaving Anyone Else Behind." Then the captain of the ship they're towing cuts the line to let Walker get away.
From Metro 2033, when Artyom doesn't understand about Che Guevara:
'"Comrade. Ernesto. Che. Guevara." The commissar rapped the seperate syllables. "The great. Cuban. Revolutionary."'
Early in Aunt Dimity: Detective, Dimity's reaction when Lori first informs her of Prunella Hooper's death, rendered in letters that take up nearly half the page: "MURDER? IN FINCH?!?"
In Fifty Shades of Grey, Christian lapses into this when he gets upset, which is often. Also when he wants to sound commanding (and, well, dominant). It's described as his "staccato talking".
"You. Are. So. Sweet," he murmurs between each thrust. "I. Want. You. So. Much."
Wings of Fire has a baby SkyWing dragon named Cliff say "I WANT. TO SEE. MOMMY KILL GRANDMA!"
In Void City, after Eric makes two failed attempts to perform a Fastball Special with Talbot, both of which end with Talbot missing his target and nearly plummeting to his doom, Talbot gives a firm refusal to Eric's suggestion of a third try.
Talbot: Do. Not. Throw. Me.
Cauldron of Ghosts: Chuanli delivers a low-key version after examining the carnage left by Battle Couple Victor and Thandi buzzsawing their way through a rival gang.
Mary. Mother. Of. God.
Overlord (2012): Cocytus speaks in one word sentences in the novel, an effect not heard in the anime.
Survivor Dogs: Upon noticing the deer has been partially eaten already in A Hidden Enemy, Alpha says "Who. Has. Done. This?"
The Darkest Dark: Chris. Was. Going. To. Sleep. In. His. Own. Bed. Tonight.
Hive Mind (2016): Adika, when he's dressing down Tobias for being late to an emergency call because he'd left his gun behind at the shooting range.
Adika moved from ordinary sarcasm to saying each word singly in withering disgust. "You. Forgot. Your. Gun."
In Don't Let the Pigeon Drive the Sleigh!, the Pigeon decides that he'd rather not drive the sleigh after learning that he'd be spending time with large smelly reindeer. He declares "FOR! GET! IT!"
:“I. Don’t. Sing.”