I think you're bullshitting me.
5 seconds sound clip from the Half Baked movie soundboard.
You can hear this line at 01:01:26 in the Blu-ray version of the movie.
Quote context
[...]
- Well, you know, I be from Jamaica, man.
- I think you're bullshitting me.
- Samson Simpson, I stick by my story!
- If I wasn't Jamaican, then why would I wear this hat?
- Hmm?
[...]