Uh, so I spent a long time trying to find an example of this, but didn’t have much luck. The Urban Dictionary says this means “what’s up”. In south Louisiana, this is kind of like a “wow!” or a yodel kind of thing.
It’s so hard to explain really. I just know that it’s terribly embarrassing if you’re graduating and your dad sends out this “AYEEE!” at the top of his lungs in a mostly quiet auditorium. *cough* It’s sort of similar to a yodel because the “a” part is a bit lower in octave and then it climbs to a higher pitch at the “e”.
I guess you could say it’s kind of like a cowboy’s “yeehaw” or a whoop since most of the time the “yodel” is used to express excitement. Just won a game? AYEEE! Kid’s graduating from high school/college? AYEEE! Just had some really good crawfish? AYEEE! You get the idea.
Now, I did find a clip of a commercial where the AYEEE is used, but the quality isn’t the best. You have to turn your volume up high to catch it. Meanwhile, I’m going to see if I can get a clip of my dad doing his AYEEE and play it for you in the future.