Describes a person with an insatiable appetite for swag(stuff we all get). Most likely derived from the expression "ham hound" which describes a person who hangs around the buffettable at a party eating all the ham.
The swaghound was stocking up on all the best freebies and giveaways at the industry tradeshow.
A person of loose moral values who engages in frequent promiscuous sexual activities with an exorbitant number of people who are usually in a relationship or otherwise committed. Said person is also usually very unattractive.
"That Jen, boy is she ever a slamhound! Did you hear she hooked up with the entire football team? She's not even that cute!"