Because The Loud House features a massive cast of characters with distinct personalities, it has inspired a staggering amount of fan-generated content. This includes:
You're referring to a popular episode from the animated TV series "The Loud House." The episode you're likely thinking of is "Lost in the Wash" (Season 2, Episode 14), but it might also be related to another episode. the loud house lost panties
While many fans write "missing scenes" or "slice of life" stories that fit the show's TV-Y7 rating, the internet also hosts "NSFW" (Not Safe For Work) content. Topics involving "lost" garments or suggestive themes almost exclusively originate in these unofficial, adult-oriented fan spaces rather than the show's production office. Because The Loud House features a massive cast