Someone who is very bent and nowhere near straight.
Oh look at that guy. He's such a Bentboy.
Olivehead is the alternative name for someone called 'Olivia', and is a common synonym for 'Liv', 'Olive', and any other variations for Olivia. Olivehead tends to be your standard teenage girl, with AirPods and a hydroflask.
Olivehead is the most unintentionally funny person to exist.