Clips built around a single quoted line like this spread mainly through soundboards and short video edits, where the exact wording becomes the search term and the joke. This one is passed around as a reaction rather than a reference, so most listeners know it from reposts, compilations and edits instead of an original scene. Its appeal is the rhetorical question at the end, which invites a second person to react and makes it easy to reuse across fandom edits, chat responses and meme remixes without needing any context.
About this sound
A short voice clip of someone saying he's a freak, didn't you know it, used as a teasing reaction sound for weird, creepy or over the top moments online.
This is a spoken reaction clip built around the line he's a freak, didn't you know it, delivered like a gossipy aside that lands somewhere between amused and judgmental. The phrasing does most of the work, turning a simple callout into a knowing punchline, and the pause before the question makes it feel like the speaker is letting everyone else in on a secret. It works because the tone is casual rather than angry, so the clip reads as teasing and dramatic at once, perfect for exaggerating how strange someone is acting in a scene.