Portmanteau of "camera" and "ambush". To surprise someone by taking a picture of them. They generally notice right as the photo is being taken, and the resulting image is often lulzy.
"Wow, you look like a deer in headlights in this pic."
"Yeah, I know...Jason cambushed me."
the extortion (errr, gift) of money illegally secured by a student-athlete (typically received via third party, ie. parents), thus resulting in penalties and sanctions for team and school
Recruiting will be nearly impossible after the cambush.