Reverse dick pic

It's the second most common picture men take (after actual dick pics). It's when you nestle your smartphone in your crotch, point the camera up at your face and snap a picture. It's popularity is due to two factors: 1) Millinials are required to chronical their lives on social media, which includes a visual timeline of their aging faces. 2) Culturally, it's less acceptable for men to take pictures of themselves than women, so they're forced to hide this act. These pictures are usually taken from the driver's seat at a stoplight, or at a group dinner of some sort from below the table. If you're at the receiving end of a rdp, it's a huge honor, so make sure to send one back.