used to signify boredom, lack of interest, weariness, etc.
Origin of ho-humconventionalized representation of a yawn
Informal uninteresting; boring; tiresome
Used to express boredom, weariness, or contempt.
Boring and dull; routine: “a ho-hum speaker who couldn't capture the attention of the conventioneers” ( Chicago Tribune )
(comparative more ho-hum, superlative most ho-hum)