Fro-yo-nonymous
An anonymous person who gives you frozen yogurt (fro-yo)
*opens the door and finds frozen yogurt at doorstep*
John: What?! Someone left frozen yogurt on my doorstep and ran away!
Eric: Did they leave a name?
John: No.
Eric: They're such a fro-yo-nonymous.
John: What?! Someone left frozen yogurt on my doorstep and ran away!
Eric: Did they leave a name?
John: No.
Eric: They're such a fro-yo-nonymous.