Chobani surprise

A Chobani surprise is defined as an event where another person forcefully feeds Greek yogurt to an unwilling recipient, resulting in yogurt spilling onto the recipients clothing. It is also considered by some to be a double entendre for an unwelcome or unexpected sexual act that soils clothing.

"Did you hear about how Chris gave Philly the 'ole Chobani surprise over the weekend?? Man, was he upset about his sweater!"