Sometimes just wearing a longcoat isn't quite enough to look badass. It can be because the longcoat in question is old, battered, two sizes bigger than needed or it can be because the character himself is lame or just acts so.
Extremely associated with police detectives, FBI and inspectors. In fact association with the latter is so strong, you will have trouble finding a character named "inspector" without a Not So Badass Longcoat of his own.
See Badass Longcoat for the inverse of this trope, and Conspicuous Trenchcoat for when someone uses a longcoat to conceal themselves, but the disguise has no effect on the audience (or appears to be hiding some Sexy Coat Flashing).
- Subverted by Inspector Zenigata, from Lupin III; he can actually be pretty badass at times, just not quite badass enough to take out Lupin and co.
- Sword Art Online: When he attacks Kirito in real life, Sugou is wearing a khaki trenchcoat. This is after Kirito beat him in ALO, turning off the Pain Absorber and killing Sugou's in-game avatar so brutally that Sugou has been left with permanent injuries in real life, and in the ensuing confrontation, Sugou loses once again to Kirito, who just barely manages to stop himself from slitting Sugou's throat with his own knife; by that point, Sugou is crying his eyes out and wetting himself.
- Fullmetal Alchemist: Lan Fan is usually a badass Ninja, but this trope applies to her at one point: she wears a long coat after losing her left arm, as well as Ling to the Homunculi, leaving her depressed and angst-ridden.
- Gareth from One Piece: Parallel Works wears a long, green coat that doesn't really serve any purpose in the story or his character development.
- In Neon Metathesis Evangelion, Touji has taken to wear over his plugsuit during synch-tests or even lead-ups to battle when he is outside the entry-plug. Asuka calls it his "bathrobe."
- In How to Train Your Dragon, Hiccup's coat/vest looks long enough to be a longcoat, but it more serves the purpose of making him look smaller than look badass.
- Deckard from Blade Runner, despite having a lot of the typical traits of a classic Noir detective, is decidedly not badass, despite his longcoat. His sole two kills in the movie are women, both of which he shoots in the back. The male replicants he pursues kick his ass up and down the field, and he's very narrowly saved from death both times (once by Rachel blasting Leon in the back, and the other time by Roy showing him mercy).
- Gary in The World's End certainly tries to look cool in his long black coat, but given how he refuses to grow up as he's reaching his forties, it comes across as rather pathetic and hence falls a bit flat. It eventually graduates into a proper Badass Longcoat when he becomes a sword-wielding post-apocalyptic hero in the film's epilogue.
- In Pirates of the Caribbean: Dead Man's Chest, Bootstrap Bill Turner wears a long, tattered black coat, which drags on the ground behind him and accentuates his slouched posture and general air of misery.
- Silent Bob from The View Askewniverse is always clad in a dark green trenchcoat. Instead of dorky like most examples of this trope, it's used to paint him as a burnout drug dealer like his friend Jay; the coat is likely to store his stash.
- Dirk Gently in Dirk Gently's Holistic Detective Agency typically wears a long, black leather overcoat (originally a part of his Suspiciously Specific Denial scheme of being labeled as a vampire), but spoils the effect with his funny hat and quirky behavior.
- Arthur spends a good portion of The Hitchhiker's Guide to the Galaxy in a dressing gown, as he had just woken up when the earth was destroyed.
- In American Gods the God of the Internet is a fat nerd who dresses like the characters in the Matrix.
- Columbo's famously shabby beige coat is a subversion. Columbo deliberately presents himself as a dim-witted slob as part of his Obfuscating Stupidity — he's an extremely competent detective who almost always gets his man.
- Doctor Who:
- The Fifth Doctor's beige-with-red-piping coat. Worn over his cricket gear, it makes him look like he's very much the team's Twelfth Man.
- The Sixth Doctor's technicolor dreamcoat. It was... a lot of things, but "badass" wasn't on that list. Six would likely disagree, but Six was not exactly sane, even by Doctor standards.
- The Eighth Doctor had a lovely Victorian-style velvet coat (stolen from a morgue tech's fancy dress party outfit), and he turned out to be one of the gentlest incarnations, making it all the more heartbreaking when his last, not-so-badass longcoat became a Badass Longcoat after he was completely broken and regenerated into War.
- Monk: Adrian Monk often wears a coat but doesn't exactly give off a badass vibe, especially with all his phobias. Make no mistake though, he is a former police officer, so there are times where even he can administer a surprisingly effective beatdown on some criminals.
- The Gang from It's Always Sunny in Philadelphia have a black leather duster that is indeed pretty cool, and they tend to enjoy passing it around. Unfortunately, they are all idiots.
- Hill Street Blues: Captain Frank Furillo is seldom seen outside without his distinctive beige overcoat over a variety of rather nice suits, which looks a lot like Columbo's in the photo above only better-fitting and less battered. While Furillo could be pretty badass in his own way, he was very much a diplomat and a Guile Hero rather than the conventional Badass Long Coat wearer. Besides, the series is set in The '80s when such coats were typical menswear and in a citynote that gets bitterly cold in the winter; he'd stand out more if he didn't wear one.
- Collins' coat in RENT is pretty beat up, with the sleeve hanging off.
- Sebastian Castellanos in The Evil Within; his dirty, crumpled, worn longcoat is a Tragic Keepsake that he wears incessantly to remember his deceased family.
- Some bandits in STALKER tend to use hooded leather trenchcoats in the Zone, because they look cool. Degtyarev can get one as well in Call of Pripyat. That doesn't change the fact that leather clothing is woefully inadequate for any of the dangers the Zone presents — be them bullets, mutant attacks, or the effects of anomalies — and the average user is an ill-equipped and combat-incompetent bad guy wannabe.
- Douglas in Silent Hill 3 wears an old long coat and he's a detective hired by the Claudia to keep tabs on Heather. He doesn't do anything particularly badass, but he does stand up to Claudia after learning what her true goals were and suffers a broken leg for it as a result.
- Dad: Carl fulfills the investigator-stereotype by wearing a big, unbuttoned, longcoat in every appearance.