lazydisapprovingHe's one of the laziest people I've ever met.
indolentSome of my classmates are indolent in their health habits.
slothfulliteraryTelevision and video games have bred a generation of slothful teens.
work-shyUKdisapprovingI don't want your work-shy cousin living with us indefinitely!
idleUKHe's an able student, just idle.
shiftlessdisapprovingHe's so shiftless he'll never make it through school.
unambitiousWhat work she needs just seems to come to her. You'll never meet a more unambitious person in your life.
bone idleUKHe's so bone idle he won't even move from the couch.