When a morbidly obese man slams himself on a flimsy looking bench with multiple people on it to make the whole thing collapse, making everyone fall on their asses, spilling any coffee or lunch they have with them

Act involving sitting on a bench, smoking a joint, and talk about neuroscience,

the act of remaining online and on call as an alternate member of your guild's raid in an MMORPG (e.g. World of Warcraft). this usually involves staying out of all other groups while at the level cap. it has been found to be very unpleasant, as it involves wasting time in the game that you've already wasting playing the game.

"Benching": it's the latest craze after "Planking" and ""Neknominate".

To sit on a bench in a public place for an hour or more, because you have no place to go, probably because you are homeless.