hum's

With his queer "hum's" and "haw's," his funny little exclamatory noises and quick, jerky manner of speech, he reminded me of a jolly diminutive priest who had just dined well.

The Paternoster Ruby Charles Edmonds Walk

All those hum's and ha's mean so many pence from the pockets of you, reader, and me.

Yet Again Max Beerbohm 1914

He clicked the beads, and began the 'Om mane pudme hum's of his devotion; grateful for the cool, the quiet, and the absence of dust.

Kim Rudyard Kipling 1900

Sucking at his pipe and devoting himself steadily to the drink, he answered in _hum's and ha's and that'll do's_ to the questions put to him, and his laughter came out of him at intervals in jumps and jerks like water from the neck of a bottle.

Capt'n Davy's Honeymoon Hall Caine 1892

Virtue itself: -- these shrugs, these hum's, and ha's,

The Winter's Tale William Shakespeare 1590