1 definition by JDunning

Top Definition
Someone who makes smart aleck, sarcastic comments, often at inappropriate times and usually at someone else's expense.
"Don't smart off to your mother, you little wisenheimer."
by JDunning January 12, 2009

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug