Calliope /kə-līˈə-pi or kaˈli-ōp/

1. The Muse of epic poetry (Gr myth)
2. (without cap) a keyboard musical instrument similar to an organ, with a set of whistles operated by steam or compressed air

• off the hooks
• off-the-job training
• off the map
• off the mark
• off the peg
• off-the-peg
• off the rails
• off the record
• off-the-record
• off the reel
• off the shelf
• off-the-shelf
• off the shoulder
• off the top of one's head
• off the track
• off the wagon
• off the wall
• off-ward
• off-wards
• off-white
• off-whites
• off with
• offy
• OFGAS
• Ofgas