A self inflicted group photo; When the participant of a group photo also acts as the picture taker. The number of participants in an "ussie" is not limited, but typically does not exceed 3 due to the close nature of the photo. Though not always, the background in an "Ussie" is often the focal point and subject matter of the picture...

The act of extreme masturbation. You must "knock one out" whilst in close proximity to any of the following; Your mum, a nun, your boss, a member of parliament, George Michael. A person with capabilities to act upon catching you mid self-abuse obvisouly ups the ante. Ejaculation must be reached before your danger wank target comes (no pun intended) to investigate. The higher the chances of being discovered with one's pants down, pulling one's war face is obviously where the danger comes from. The more danger involved the harder (or softer) it is to complete the task in hand (snigger). The more dangerous the better. The chance of being arrested, pummeled by an angry father or having your hand severed by an arab's sabre means that you are a pro "Danger wanker."

Taking a selfie with your friend(s) or significant other.

Picture taken with not just the self, but more than one person; a group selfie.

The act of taking a picture with another person using the frontal camera.

Like a selfie, but instead of just you and or one or two other people, it's a picture of you holding the camera, and a large bunch of your friends.

It's a "Selfie" except there are two or more people in the frame. It's not a photo of "Self" it's a picture of "Us".