A dirty Philadelphia is when you wipe the dick cheese off under you womens nose.
My friend said he gave his girl a dirty sanchez, I had to one up him and gave his a girl a dirty Philadelphia.
by the dirty Philly September 25, 2012
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When a man places his finger in a woman's anus and feels his dick while fucking her doggy style.
Brian: "Hey Keith, I tried that move last night, with the finger."

Keith: "Ohh, the Philadelphia Dirty Bomb? I did that this morning."
by hymee9 September 17, 2008
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