Face-planked - To go down like a sack of bricks, face first, and hope nobod

To go down like a sack of bricks, face first, and hope nobody saw you flail like a confused chicken.

I face-planked off a curb and my knee is still sore from the incident.

My brother face-planked into a cake and now he's covered in frosting.

I face-planked during a math test and got a zero.