clam stabbing 

Male to female vagina intercourse.

Rob did some serious clam stabbing in his day.

clam stabbing by Fav December 1, 2006

clam stabbing 

(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.

clam stabbing by Antenna Wilde February 15, 2008