The clip comes from Peter Griffin, the main character of the animated sitcom Family Guy, and circulates online in edited form rather than as a clean show excerpt. Short cut-off lines like this spread on soundboards and in meme edits because the unfinished word lets creators imply an insult without finishing it. The niconico ni wording in shared titles mixes the cut-off with wordplay around the ni sound, which helped the short 2.6 second clip keep being reposted as a reaction and bait-and-switch sound.
Über diesen Sound
Peter Griffin from Family Guy delivers a short cut-off ni line in this meme sound effect, used for bait-and-switch jokes and awkward reaction edits.
This is a very short Peter Griffin voice clip from Family Guy, built around him starting a harsh insult that begins with ni and getting cut off mid-word. The abrupt stop is the whole joke, leaving the line unfinished and turning an aggressive setup into a silly, censored punchline. His familiar cartoon delivery makes the moment instantly recognisable even without video, and the sudden silence after the cut creates a perfect beat for a reaction face, a freeze frame, or another sound to land right after it.