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1.
1. To use your finger and wipe it across someone's cheek or anywhere on there body.
1. lol that guy just fadonged that guy so many times.
by EnergyCreations June 14, 2010
 
2.
1.)To take ones penis and us it to smack a nearby person.
2.)Also used to suggest a defeat or embarrasment.
1.) "With a resounding wet slap, Jimmy fadonged Martha with his penis"

2.) "After losing the guberatorial nomination, the candidate felt very fadonged"
by Jaketastic May 27, 2006