Top definition
The word was invented in 1893 by physiotherapist John F. McNunu. Williams described it as: "The organic tissue of the back of the patella."

What does this mean in laymon's terms?
Zenphrum is identified as the Skin of the back knee
1)
girl1: Awwe! Look at that girl's zenphrum!
girl2: I wish I had zenphrum's like that

2)
boy: UUGHH! That persons zenphrum is HUUGE!!! EWWWUUGHHHWWWWEEEEE
by Dr. K.I.Twat September 29, 2010
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