A brotato is a really good friend that is a dude. it is made by combining two words: brother-a name black people call their friends, and potato-a delicious food when sliced and deep fried in oil.
1) A brotato is a bro, or really good friend, that you smoke weed with. It's a mix of brother, and potato, as in baked potato. It is like one of those twists on the word bro, like bromeister or broaster oven.
Brotato is Someone who is your close friend and brings the best and Derpyness out of you. Or someone you feel like you can be yourself around and can naturally random with.