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The art of stuffing your hand and arm into your parteners anus.

similar to fistballing

Note: sitting may cause discomfort after fistballing
Using the powerfull techniques of handballing Bill gently stuffed his fist and arm into Al's secret anal space.
by skin May 20, 2004
Fisting, as practiced anally among gay men.
Handballing is a true expression of boy-love
by cornholio October 16, 2003