Sara Lewis answered
A Scottish topper can be a couple of different things: Firstly, it is the collective name for Scottish sailors of the topper boat.
A topper is a type of boat from the dingy family. It is an ideal boat to learn to sail in as it safe and stable. They are made from polypropylene which is extremely durable - car companies manufacture bumpers from it!- so they are easy to look after and keep in tip top condition (excuse the pun!).
The great thing about toppers is that as your sailing improves, and you gain in confidence, they are also a popular racing boat, and have gained full international racing status.