When somebody says you’re shockin’, they’re basically saying, in a light-hearted way, that you’re devilish, or mischievous or naughty. Sometimes when the phrase you’re shockin’ applies, would be say, when you burst out laughing in the middle of church. Or if you say, you know, I went home last night and I was so hungry I ate an entire large pizza. Somebody would be liable to say to you – “My god you’re shockin'”. Or, if you were on the phone with your friend and you found out that they spent a huge amount of money on a pair of shoes, or something like that, and you say oh my god you’re shockin’ When someone says you’re shockin’ they actually kind of admire your choice, and are envious that you maybe did something that they would like to do too.