A man's penis, specifically in the erect position.
My mantenna is detecting some estrogen in the area, so I should follow it to find the girl of my dreams.
by Marcus Solomon October 30, 2007
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the male penis... but unlike many antennas, this mantenna can only be used properly by a female... unless your gay.
"Oooo... look at the mantenna go up!"
by D&J November 15, 2002
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Another word for male genitalia. Synonymous with Wang, Wiener, Cock, Dick, Junk, and any other word for Penis.
Guy 1:"So, hows reception on the old mantenna?"

Guy 2:"Reception on the the wha?"
by Khazilla November 23, 2010
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