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

• apanage
• apar
• aparejo
• apart
• apartheid
• aparthotel
• apartment
• apartment building
• apartment house
• apartotel
• apatetic coloration
• apathetic
• apathetically
• apathy
• apatite
• apatosaur
• apatosaurus
• Apatosaurus excelsus
• Apatura
• Apatura iris
• APC
• ape
• ape-man
• Apeldoorn
• apelike