Top Definition
A late night trip to a supermarket, normally performed under the influence of alcohol. The supermarket of choice is usually Tesco due to its 24-hour opening times. A selection of goods is purchased and are consumed in the car park.
It's 1 am and we're bored... let's rock down to Chesterfield for a Tesco Picnic.
by Andrew Waite September 08, 2005

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