Definitions by B. Dory

light 

adj. Somebody who is 'light' is boring and often unwilling to take part in adventurous activities, usually for fear of being unsensible or dealing with the consequences.

Originally comes from 'lightweight' - somebody who cannot hold their drink.

"Don't be light" lyrics from song by AIR of the same name, urging people to take more risks.

Itapu: Nah, I don't want to take part in the wrestling-whilst-covered-in-flaming-jet-fuel-athon. I'm just going to stay at home.
Trevor: ffs, you're so light

light by B. Dory March 21, 2009