Anything that you've learnt from Bear Grylls (man vs wild)but you used it in a real urban environment (most likely whilst being drunk)
When you cant get in your mates house after a big night out so you make a nest out of branches on the driveway and make a fire from your mcdonalds bag.
THATS BEAR GRYLLIN-IT!
1. To camp or sleeprough.
2. To complete an action with minimal tools or technology, usually in a ham-fisted manner.
This expression comes from star of T.V. show 'Bear Grylls: Born Survivor' who frequently throws himself into dangerous wild situations in a bid to educate the naive urban populations. There is some controversy over whether he actually 'Grylls it' or lives the cushty life whilst off camera.
1. He's not staying in the lodge tonight, he's Grylling it.
2. He didn't evenbother with tools to start that fire, he was Grylling it.