Top Definition
When you slap someone across the face (usually female) with your penis.
Bill: "Hey Dorithy mind if I tally wack you"
Dorithy: "Sure Bill go ahead"
Bill: "SMACK BITCH" ^_^
by John Auison May 14, 2006
To jack off.

Also known as: slippin' the fishy, spanking it, choking the monkey, cranking the pecker, or teaching the one-eyed china man how to dance.
"Please, tallywack me darlin.'"
by Poke My Poker April 14, 2004
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