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1.
The act of sliding the index finger into the vagina & the thumb into the anus of a woman on all fours, preferably lubed & naked.
Also not a direct member of one's own family.
Term used in Boston ,Mass,USA.By a guy called CHARLIE.
Camilla held back the tears & bit the pillow while Charles slipped her the u-bolt.
Little did she know that not only must she suffer this indignity at the hands of H.R.H. but he would also leave her bearing the mark of shame,a dirty sanchez.
by PEET February 28, 2004
 
2.
A u-turn.
by drl May 22, 2003