Top Definition
A gigantic, huge mega-penis. It is roughly the size of an anaconda. Since no condoms will fit a pillow penis, garbage bags may be substituted. Oral Sex may be dangerous with a pillow penis-many women have lost an eye due to the size of the jumbo penis.
Moose, bulls, elephants, and whales all have smaller penises than someone with a pillow penis.
by Mounted_by_the_Mountie January 25, 2010

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