A long horizontal smear on the bottom of your Iphone caused from answering a call using the slide bar with a greasy finger.
Mike: Yo maing whats that dirty mark on your iPhone?
Trev: ahh thats just an iSmear from my greasy finger.
Trev: ahh thats just an iSmear from my greasy finger.
by Toffeemon January 04, 2010