idle

adjective

not in active use
“the machinery sat idle during the strike”
unused
not in action or at work
“an idle laborer”
not having a job
“idle carpenters”
joblessout of work
not yielding a return

dead
lacking a sense of restraint or responsibility
“idle talk”
loose
silly or trivial
“idle pleasure”
light
without a basis in reason or fact

wild

noun

the state of an engine or other mechanism that is idling
“the car engine was running at idle”

verb

run disconnected or idle

tick over
be idle

slug