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

• quahog
• Quai d'Orsay
• quaich
• quaigh
• quail
• quail at
• quail brush
• quail bush
• quaint
• quaintly
• quaintness
• quake
• quaker
• Quaker gun
• Quakerism
• Quakers
• quaking aspen
• quaky
• quale
• qualification
• qualified
• qualifier
• qualify
• qualifying
• qualifying adjective