1. So lacking in interest as to cause mental weariness
   "a ho-hum speaker who couldn't capture their attention"
   - boring, deadening, dull, irksome, slow, tedious, tiresome, wearisome, unamusing, draggy

See also: uninteresting

Encyclopedia: Ho-hum

• subarctic
• subartesian
• subatomic
• subatomic particle
• subaudition
• subbase
• subbing
• subclass
• subclass Acnidosporidia
• subclass Actinopoda
• subclass Alismatidae
• subclass Amphineura
• subclass Anapsida
• subclass Archaeornithes
• subclass Archosauria
• subclass Arecidae
• subclass Asteridae
• subclass Branchiopoda
• subclass Caryophyllidae
• subclass Cirripedia
• subclass Cnidosporidia
• subclass Commelinidae
• subclass Copepoda
• subclass Crossopterygii
• subclass Diapsida