when I held the assembly that women are fun I were just lying

"when I held the assembly that women are fun I were just lying"

The speaker had previously said so to an assembly of workmates. What does the sentence mean?

The sentence can be heard (with the corresponding closed captions) at the minute 11, on the third episode of the 20th season of South Park, which is on official page for free.

What does hold sb that... mean?

Could that represent the ellipsis for "at which I said"?

Here's the excerpt of the video: https://youtu.be/p-Bb6lnekX0 Here's the script: https://southpark.fandom.com/wiki/The_Damned/Script

Solution 1:

The closed captions on the South Park site are not what you are quoting in your question:

So, when you held the assembly...
that women were just as funny as men,
you weren't being sarcastic?

The pause between assembly and that indicates natural speech: she is thinking about what to say as she is speaking.

It seems some of her thoughts are elided, and what she says can readily be understood as:

So, when you organised the assembly and you said
that women were just as funny as men, ...