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

• rectal artery
• rectal reflex
• rectal vein
• rectangle
• rectangular
• rectangularity
• rectifiable
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• rectifying tube
• rectifying valve
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• rectilinear regression
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• rectoplasty
• rector
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• rectory