Jimmy Kimmel Gets Eyeful of Matthew McConaughey’s Brother Rooster Via NSFW Cell Phone Photo (Video)

Also known as “pecker head,” and he’s nuts

Matthew McConaughey has a brother named Rooster — or as Robert Duvall likes to call him, “Pecker Head” — and he stopped by Jimmy Kimmel’s South by Southwest set on Wednesday to show the comedian a picture of his privates.

Well, it’s hard to say for sure, since Kimmel described the photo on Duvall’s cell phone as one he “can’t show on television.”

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“Little low hanging fruit in there,” Rooster says, confirming speculation that it was, indeed, a picture of his genitalia. “Can you tell which ones are the Duvalls and which ones are the McConaugheys?”

The image was supposed to be a 60th birthday gift for Kimmel’s friend, Howard Stern.

How thoughtful.

Fun fact about Pecker Head: He names his kids after booze he likes to drink.