Azaran comes from the verb azarar, which means to annoy, bother, or make someone nervous. It's a less common word than molestar or fastidiar, making it more interesting and unique.
In the song, the lyrics mention, "Tiene un par de tigres que la azaran," meaning she has a couple of guys who bother or annoy her. This word choice adds a touch of street slang and local flavor to the lyrics, making it stand out.
"Fronteo" is Pinto Picasso's victory lap after landing a girl every other guy already had a claim on. He opens by listing the flex point by point: a new car, a fresh fit, new perfume, and a woman he pulled straight off someone else's arm the moment he messaged her.
He calls her two-faced without turning her into the villain, sweet on the surface and a lot more trouble underneath, the kind of woman other guys keep calling while she stops picking up. By the chorus his whole case comes down to one idea: nobody else does what he does, so there's no real competition. By the second verse she's calling him back without even thinking about it. The song doesn't build to a big finish, it just trails into ad-libs and hype talk, which fits, since this was never really about her. "Fronteo" is slang for showing off, and the woman is mostly there to prove the flex worked.