Definition funny of Mightymouse:

urbanStuffing ones finger along with the male member into a woman to appear to have a larger penis.

urbanMan she screamed when I gave her a mighty mouse!

urbansweetest cartoon super hero ever!!!!

urbanperson: Whoa that weird flying mouse just saved those people. other person:thats no ordinary flying mouse its MIGHTY MOUSE!!!!!

urban1. small bread eating rodent 2. Crime fighting irc nerd

urbanis it a birn? NO is it a plane? NO ITS MIGHTYMOUSE

urbanA lowly 16k on genmay. He really wants an avatar for some reason. Doesn't make threads. Overall fgt.