Potlood is the Dutch word for pencil, and online the joke comes from shouting that ordinary word as if it were important. The bass boosted version circulates on soundboards and in short meme edits, where creators reuse the same two second blast for unrelated scenes. Tags on uploads also credit the name Mohssine, though the wider spread comes from copying and reposting rather than a single known source. It stays in use because the distortion makes a simple shout instantly recognizable, even without any context from the original clip.
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Potlood bass boost is a short distorted shout of a single Dutch word, used as a loud meme sound effect for sudden jokes, edits and reaction clips.
The clip is a two second bass boosted shout of the single word potlood, stretched out into a long POTLOOOOOD yell. The voice is heavily distorted, with the low end pushed so hard the syllables rumble, clip and wobble instead of sounding clean. There is almost no build up, so the word hits immediately at full volume and then cuts off. That sudden blast is what makes it funny in edits, because a normal moment is interrupted by an absurdly loud, meaningless shout that feels both startling and deliberately over the top.