Holy shit you have balls haha. I've definitely drank like 2 shots before giving a HUGE presentation in a class I had to take, and it worked wonders. Although if you knew me you'd know I was a little buzzed. I don't think its a bad idea, but its definitely not a good one haha. The better decision is to let the employer know you are a person who stutters and if it's that big of a problem for the employer then you don't even want to work there.