Formal boundaries

One time I crossed a formal boundary was during work with a person in a higher position than me. We were discussing some products that we needed and everyone else uses an informal name one of the products. I used the informal name, which also happens to not be the most school-friendly name, which caught him by surprise. Luckily he just laughed at it so I had no issues. I could have just done better by not slipping up and using the improper name for the product.