um

COULD be used as an abbreviation for Urmom.

Person 1: Should an orange be sliced or peeled?
Person 2: um
Person 1: wdym
Person 2: um
Person 1: You never ate an orange before?
Person 2: um = urmom
Person 1: ...

um

COULD be used as an abbreviation for Urmom.

Person 1: Did you actually have seggs with that girl
Person 2: um
Person 1: omg he actually did it rofl
Person 2: um = urmom, also I did not