Bacon is a thin, salty meat product that's often served beside eggs at breakfast. Some people like their bacon cooked until it's crispy.
If you're a vegetarian, you might order a BLT and say, "Hold the bacon, please." Bacon comes from the belly or the sides of a pig, and it's typically swirled with fat, cured or smoked, and very flavorful. The word and the food have been around since at least the early 14th century, from a Proto-Germanic root, bakkon, or "back meat." Since the early 1900s, "bringing home the bacon" has been slang for earning a living.