'eff-oh-eff' ; Fucking On Film. To knowingly perform sex acts, either solo or with a partner, while being video recorded.
"I wouldn't call myself a porn star, but I did some F.O.F. in college"
"If you want to shoot a couple of stills for your scrapbook, then fine, but absolutely no F.O.F."
A derogatory adjective for Mexicans who are "Fresh Off the Fence" similar to the phrase, "Fresh Off the Boat" that is commonly used with Asians. It basically means they just came across the border, and have not yet gotten their green card.
"Why doesn't Roberto Humberto run for president in 2012?"
"He can't, he's F.O.F."