No clear original recording, performer or year is documented for this Swedish clip, so it circulates mainly as a standalone soundboard upload under its shouted first line. The phrase translates roughly as I pooped myself, with the follow up about poop all over the floor, which explains why English speaking creators use it without needing the language. Online it sits alongside fart sounds and other gross out reactions, shared for toilet humour, messy pranks and exaggerated disgust rather than for any known scene or character.
About this sound
A Swedish voice screams ahhh jag bajsade ner mig, saying there is poop all over the floor, used as a funny reaction for messy fails and bathroom jokes.
A panicked Swedish voice shouts that he has pooped himself, then keeps screaming as the mess is described all over the floor. The delivery is loud, frantic and completely over the top, turning an embarrassing bathroom accident into a cartoonish outburst. There is no calm build up, just instant horror and disgust played for laughs. That exaggerated panic is what makes the clip land as a reaction, because the scream says everything before the words are even translated, and the longer it goes on the funnier the meltdown feels.