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

• polo mallet
• polo pony
• polo shirt
• polo stick
• polo-neck
• polo-neck collar
• polonaise
• polonium
• polony
• Polska
• poltergeist
• poltroon
• poltroonery
• poly
• polyamide
• polyamory
• polyandrian
• polyandrist
• polyandrous
• polyandry
• Polyangiaceae
• Polyangium
• polyanthus
• polyarchy
• polyarteritis