I think it's a sound effect of some kind, actually. Gave it my best guess for now and I'll fix it when the new strip comes out if it's wrong. Seems more likely than "old man", since, like, the only character to come to mind is that guy from the New Year's event, who... I'm not sure if they referred to him that way or not.
No way!
Don't even try i-...!*Siiigh...**Lounging~*Ame! ♪Eh!?You will, Ame-chan!?No, well...
Yeah...
Pretty impressive...Ame~ ♪...What do you think?Me ♪*Jerks awake!*A princess carry, huh...
I wonder what that would feel like?