After having sex and your partner goes to sleep, you take a poop on their torso. Then, you leave. Setting flame to the poop is optional.
I waited for Kate to pass out, then I left her with a fresh Charleston Steamer.
by STL2008 January 01, 2008
During a cold, winter night, you proceed to take a dump on a companions face.
"Man, we went up to the cabin for the winter and the heat went out. I had to give Tommy a Charleston Steamer to prevent any frost bite from setting in on his face."
by Harry Bush January 05, 2006
To shit on sex partners face after they have fallen asleep.
Michelle woke up to a charleston steamer from Dale.
by mbjdrj March 13, 2010