To purchase goods with the intent to return. Usage: "My dad lechmered an 802.11b hub while I'm home for Christmas."
Based on the department store of the same name's liberal return policy -- accepting anything for return in 30 days -- lechmering was a popular activity among East Cambridge denizens (especially students at MIT). Items lechmered included large television sets for the Super Bowl, stereo systems for parties, and vacuum cleaners to prepare for visiting parents.
Rumor tells of students who would exchange their stereo system every four weeks for their entire college stay, leaving school with a brand new stereo -- bought four years prior.
Lechmere has, unfortunately for many, gone out of business, but the practice remains where there are stores with liberal return policies.