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1.
counterpart to ahem. To be used in pairs by the conversing parties.
Ahem, if you could assist me.

Ahum, I could.
by iwrotethissongalongtimeago November 13, 2008

Words related to ah um

buh er guh homina uhhhhhhh
 
2.
It is slang for 'i am'.
You:You going out tonight?
Me:ah um
by Josh July 26, 2003