TMZ reported Monday that Farrah Abraham -- the same "Teen Mom" star who was recently in the news for a DUI arrest -- now has a sex video being shopped around to various pornography companies.

However, Farrah denied the alleged existence of the 30-minute tape when TMZ caught up with her...and also said some pretty dumb stuff:

In case you need a breakdown for all of the mind blowing examples of unintelligence just displayed:

1) Farrah clearly has no idea what the word "elaborate" means.

2) Or the word "exist": "I don't exist anything about that."

3) "If I have my own personal stuff, that's my own personal things."

Well, not everyone can be the sharpest tool in the shed.