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"Thingwee" is a term often used to describe something when all other words are lost. Jim's often use this word.

"Can you pass me the thingwee?"
"Which thingwee?"
"The thingwee thing, right there look."

A thingwee is also used to define a persons penis, a well hung cock. "Get your thingwee out, Jim. You're gunna get a damn good banging. Quick, your thingwee thing."
by Scottishmad December 22, 2013