When your ear itches deep down inside, and the only way to make it stop is to plunge your finger into it and make a rattling motion, as if trying to scratch the itch. Upon doing this, the relief one feels is so intense and pleasurable, it can easily be compared to an orgasm, and some may even say it is difficult to stop digging at the itch once you start, so you are left fingering your ear like an idiot with your eyes rolling back in your head as if you are actually having an orgasm. Thus the term, Eargasm.
John found it hard to resist when his ear suddenly started itching in the doctor's office, and he soon found himself having an eargasm in front of the entire waiting room.
Term used to refer to a young woman's tight-looking ass, especially if she's wearing tight-fitting jeans. Not generally used in reference to a man, unless the speaker is gay or a redneck female with absolutely no regard for her own reputation.
Joe: "Dude, what are you looking at?"
Steve: "That chick's dookie box, bro. Check it out!"