To rub, to blur, or to make indistinct: "Mary used the art gum eraser to smudge the picture and to create the appearance of fog."

A spot or stain on something: "After eating a hamburger, Bill discovered a smudge of catsup on his shirt."

1. Having or showing the annoying quality of people who feel very pleased or satisfied with their abilities, achievements, and having a glow of self-congratulation: "Samuel had a smug expression on his face because he was sure he had won the competition."
2. An archaic or out-of-date usage: very clean, tidy, and very correct: "Rick's desk in the office was always smug as were the documents which he wrote."

1. Close fitting and comfortable: "The new coat had a snug fit and was very comfortable and warm."
2. Warm, comfortable, and safe: "The Christmas poem described the children as being snug in their beds."

"The cottage was a snug place to be on a rainy afternoon."

To fasten down securely: "The sailors had to work hard to snug the barrels on the deck so they would not roll around."