Top Definition
Having a party dressed in Pyjamas.
Allso refered to as "jammy's"
Often takes place on a plane from Norway to San Diego, or in San Diego itself.
Yo dood we havin a jammy party on the plane to San Diego, it's gonna be me Elise and Silje there, probz som more doods, why dontya come?
by Figzyy May 16, 2014

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