1. A normally emphatic utterance usually spoken to indicate enthused happiness, joy, or various types of victory, though dialectic evolution now sees the term used to express other emotions as well, such as surprise, anger, disappointment, even sorrow.
2. An emphatic utterance often spoken, principally by a male, during sexual intercourse at the moment of orgasm.
b. When the waitress brought my chicken-fried steak and mashed tatters and gravy, I took one look at the steaming dish, sat back and said, "Ah yeah!"
2. a. When Swain was humpin' Polls, he groaned "Ah yeah!" as he was sploogin'.
b. Horse was bangin' this chick in the backseat, and it wasn't long before I heard him say "Ah yeah!"