1 definition by Datlofian Citizen

A quite average penis between a chode (short and thick) and an ewok (long and thin) in length and girth. Neither too long or short, or too thick or thin. Derived from the words 'between' and 'weenie'.
"I saw Jake's penis, it was a tweenie. Quite average really."
by Datlofian Citizen October 6, 2016
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