a mad ting - A thing that’s so awesome or so hard to understand, it’s lik

A thing that’s so awesome or so hard to understand, it’s like your brain exploded and you said, 'What?'

'That math problem was a mad ting! I thought I had a brain, but now I don’t.'

'That movie was so awesome, it was a mad ting!'

'She just did a backflip in a library. That was a mad ting!'