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

• afeared
• afebrile
• affability
• affable
• affableness
• affably
• affair
• affaire
• affaire d'honneur
• affairs
• affect
• affectation
• affected
• affected role
• affectedly
• affectedness
• affecting
• affectingly
• affection
• affectional
• affectionate
• affectionately
• affectionateness
• affective
• affective disorder