Top definition
Slang for a mans penis, usually used in reference to homosexual activity.
'' Theres nothing Richard likes more than a mantube''
''My mantubes about to explode, wheres the bathroom''
by Jarrod A February 19, 2006
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2
"Holy hieroglyphics Batman! You're man tube is sextactular!"
by dr. gigantor December 24, 2011
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