shwapping involves taking items such as clothes you don't need or want anymore to a free shop(a place where no cash is exchanged), and you give way the clothes you don't want or need and in return have a look for and take clothes or items you either want or need.
Steve went shwapping today. he shwapped a pair of black jeans for a pair of blue ones, and spent no money. thus saying a big stuff you to blind consumerism.
fashion conscious Ben on the other hand spent 60 pound on some brand named jeans, which went out of fashion a week later.