The Blasť Boast is Badass Boast being played as if it were ordinary business. It may look like someone acting dismissive of their deeds, but the boaster is actually very proud of them. They are just being dismissive to mess with someone's head, or to seem more Badass. If the "boaster" is honestly dismissive of what they did they're just saying But for Me, It Was Tuesday and thus not a boaster. If they're ashamed, they won't bring it up outside of Your Approval Fills Me with Shame or Never Live It Down. Compare Think Nothing of It.
- Alaric Morgan, his thumbs hooked in his swordbelt, addressing Mearan prisoners in The King's Justice. He's boasting about his Deryni powers (Mind Reading), which most of them only know by fearsome reputation. He's more overt when he proposes this to Kelson, "I assure you, my culling would be far more than just lots," and he reminds Kelson that he (Morgan) already has an infamous reputation.
"All right, you know who I am," he said, his voice stern but without deliberate menace. "I'm going to have a private little chat with each of you. While you're waiting for your turn, I suggest you give careful thought to which four of you deserve to die for what you've done—because I'm going to ask you that, and I'll know if you're lying. That's the fairest way I know to see that justice is done—though I'm sure His Majesty is right that more than four of you probably deserve to hang."
- In the Ciaphas Cain books, Cain does this a lot. He makes sure to remind the reader that he only does it to seem like a Humble Hero.
- In the Harry Potter series, Albus Dumbledore contemplates Azkaban, the hellish abomination-guarded prison from which only two escapes have been carried out in its multi-century history:
"I have absolutely no intention of being sent to Azkaban. I could break out, of courseóbut what a waste of time, and frankly, I can think of a whole host of things I would rather be doing."
- Death in Supernatural alternates between this trope and But for Me, It Was Tuesday when talking to the Winchesters. As a cosmic entity as old as the universe, he's beyond taking pride in his work, but he does like to remind them why their attitude does not impress him. Once, when they ask him for advice:
Bobby: That [door to Purgatory] only opens in the eclipse, and that's over...Death: I'll make another.
- In Tales of the Questor, Quentyn's father can be one evil old goat. This is definitely the "mess with someone's head" variety.
- In Grant, the eponymous character states that no-one is strong enough to rip a padlock off a door. Then he calls the lock a piece of junk when he does precisely that, startling his boyfriend. He could also be hiding his true nature from a girl he's rescuing from the horse trailer the padlock was on.
- Noah in El Goonish Shive empathizes with Justin's anger issues:
I am good at controlling my temper now, but I was suspended on my first day of high school for beating up two seniors who were playing keep-away with my backpack. I heard they are offensive linemen on a college football team now. Whatever that means.
- In The Dreamland Chronicles, the dragon Nicodemus has ruled the Dreamlands for a very long time, and likes people to know it:
Please do not lecture me on the old ways. I created the old ways.
- When Genocide Man's One-Man Army Jacob meets someone who accuses him of almost killing her, he shows how it's done:
Child, I don't think I've ever "almost" killed anybody.
- Twitter has #humblebrag.