A sex party and/or orgy where everyone must have at least one sexualy transmitted disease(std)
My balls itch, that must have been some picnic last night.
by The Albino Rhino April 17, 2004
Three nerds on top of one another wearing only suspenders and glasses
After a day filled of tutoring, the three nerds changed into the proper attire of suspenders and glasses alone and rewarded themselves by having a picnic.
by CALCULATORSXRXLIFE April 09, 2006