um-hum

Yeah, um-hum, I wasn't able to understand that, because it was the first time in my life that I'd heard of a school they'd named after a person, and they're still living.

Oral History Interview with Willa V. Robinson, January 14, 2004. Interview U-0014. Southern Oral History Program Collection (#4007) 2004

Half the time he answers what I say to him by nodding and saying 'um-hum,' with that same old foolish, contented smile of his.

Beasley's Christmas Party Booth Tarkington 1907