Top Definition
1- A small child who steals things
2- Covertly cuddling with somebody
3- A stolen pastry
4- An "ultimate" term of endearment for a special someone
1- "I can't believe my five year old son stole a piece of gum from his sister - he is such a smugglemuffin!"
2- "I found two smugglemuffins ditching class and cuddling under the bleachers."
3- "I made cupcakes this morning before work, only to come home and find one missing. The culprit - ScottieTooHottie - turned my cupcake into a smugglemuffin."
4- "Oh, you're my little smugglemuffin and I'll always love you!"
by jacques.cousteau October 18, 2006

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