It seems there are still a few things David Duchovny has yet to find out the truth about.

“On fleek” is one of them.

The X-Files star joined Ellen DeGeneres where he revealed his confusion about his daughter’s favourite term.

“I told her I was going on your show and she said ‘just make sure your eyebrows are on fleek’,” he said.

“It’s like a joke we have because she’ll never tell me why they’re on fleek.”

The truth is out there David, the truth is out there.