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2.
Male to female vagina intercourse.
Rob did some serious clam stabbing in his day.
by Fav December 01, 2006
 
1.
(verb) A penis thrusting into a vagina in a rapid and often vicious manner. Usually done from a standing position, or in a position where only the genitalia are in contact.
Felta and Favreau went double team clam stabbing on that switch hitting duo in da Port.
by Antenna Wilde February 14, 2008