The act of french kissing a girl while you have smokeless tobacco in your mouth.
In Joe Dirt, Joe kisses a girl while he has a dip in his mouth and says, "keep that skoal baby." That is memphis mouthwash.
by jd220905 April 8, 2008
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when a man jizzes in a womans mouth then pisses in it, leaving a scent reminiscent of the southern cesspool of Memphis Tennessee.
"Did you hear about Amy Winehouse?

yeah she showed up to an interview smelling like Memphis mouthwash
by honkyhater69 June 7, 2011
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