It's about smiling. Ear-to-ear smile or grin is when you have a very broad and generous smile. Such a smile when each corner of your mouth is by each of your ears.
Listening to the rumors, talkings, and stirrings of a ghetto-fabulous area in order to pick up some sort of new information and or new trends in a community
Gangster 1: Yo, you hear that new Lil' Wayne track that leaked?
Gangster 2: Yea nigga, I be keepin my ear to the streets and got that hot shit a while ago.
A variation of the Wet Willy. Instead of wetting a finger with saliva from your mouth you insert your finger into your anus and then insert it into the ear of the victim.
Person 1 (after whispering to person's 2's ear): "Why does your ear smell like shit?"
Person 2: Oh, Matty went Ass to Ear on me about an hour ago"
Person 1: "Oh that's nasty you never go Ass to Ear!"
Small braid worn on the side of a mans head behind his ear indicates he’s feeling sexual tension towards other men and wants to be dominated and gang raped by 13 multi-racial bikers with baby cocks .