Swertainly is a modified form of the common word "certainly." It is most often used to affirm a statement someone just made. Swertainly is also used on the streets as a more endearing term of acknowledgment. When used on the streets, the phrase "my dear" is frequently added on to the end, creating: "Swertainly, my dear."

When you eat dirt for the first time and leave your family to build a shack in the woods