Traditional - An evolved form of The Shocker. A quacker is when you apply the traditional shocker to a woman while watching Howard the Duck, eating Peeps
marshmallow treats, and/or holding two pringles chips
in your mouth to simulate the appearance of a duck.
Slang Usage - A quacker also applies to any molestation of female ducks including but not limited to a human male twisting his sausage into a
counter-clockwise spiral in order to insert into a female ducks spiraled vagina.
Seriously, female ducks have spiraled vaginas…look it up.