A term used in describing foot odor, it is typically used when the odor has a particularly "wet" or "musky" aroma, or when the smell is so strong that simply telling someone that their feet stink is not enough.
"Ugh...Jesus dude...(gags)...your girl's got some serious swampfoot!!"
by frostboy74 September 16, 2009
smelly sweaty feet.
"my wife calls me swamp foot!"
by steve harvey November 20, 2003