lazy-bones
A particularly lazy or indolent person. Come on, lazy-bones, you've spent half the day in bed. Time to get up and be productive!
lazy man's load
A large amount that should be carried over multiple trips, but which a person tries to carry all at once in order to avoid making a second trip. Stop trying to take a lazy man's load—take two trips to bring the groceries in or you'll end up breaking something.
lazy man's load
An extremely heavy burden undertaken so as to move it in one trip rather than making several trips. Always referring to moving something physically, this cliché dates from the turn of the twentieth century and may be dying out.