The act of smearing poo on someone to give them sideburns. Usually done in their sleep. Much like a "Dirty sanchez" or "Hitler".
Chris got a fonzie last night, and it smeared all over his pillow.
by Noah April 07, 2004
when fingering your partners ass with your thumb right before he/she orgasms the partner exclaims in particular Fonzie fashion the coined term that made him so famous AAAAAAAAAAAAAAAAAAAA!!!!!!!!!!!!!!!!
A Fonzie in the ass is worth two in her bush!!!!
by coolrelax69 April 15, 2005

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