Haggis/ˈhæɡɪs/ Definition 1 of 2Pro Tip 1/3Traditional Cuisine Haggis is deeply associated with Scottish heritage and often eaten on special occasions. They served haggis during the Scottish wedding feast. Pro Tip 2/3Preparation Method Originally cooked in a sheep's stomach, modern haggis may be packaged differently. You can buy haggis in a synthetic casing nowadays. Pro Tip 3/3Cultural Events It's customary to eat haggis on Burns Night, which celebrates the famous Scottish poet. The haggis is piped in on Burns Night.