SWAK

written and sent with love and care. (The initialism is sometimes written on love letters. Also an acronym.) All her letters come SWAK. I know they are sealed with a kiss, because she says so.

A mark of affection on the back of an envelope. Before e-mail, Facebook, and Twitter, people exchanged romantic sentiments by means of handwritten letters. One way to include a final bit of tenderness was to write S.W.A.K. on the back of the envelope. Women often blotted their lipstick over the four letters to emphasize their love.