Stalling the flow
When there is work to be done, yet all you do is joke around.
Person 1: "Hey did you finish the advanced factoring of Calculus Polynomials??"
Person 2: "Hey man remember that time at the fair when you puked?"
Person 3: "Dude, you're stalling the flow."
Person 2: "Hey man remember that time at the fair when you puked?"
Person 3: "Dude, you're stalling the flow."