(Pronounced sw-AM-p, like someone exaggerating a midwestern accent would say it) A male extension of swag. Swamp is something much more powerful than swag, and is only attainable by males. Swamp is the display of extreme manliness and badassery.
In Star Wars-When Leia tells Han Solo "I love you," and he says, "I know." This is the prime example of swamp.
Swamp occurs when, due to the hot weather, parts of your body covered by clothing get all gross and sweaty.....the most common being 'swamp-back' at school, underneath your skirt and shirt from wearing your bag around!
"ew, it's so hot i'm getting swamp back!"
"I have swamp EVERYTHING!!!!"