MC Eiht has "Geah!," Pusha T often says "Puuuush" at the end of his verses, and Rick Ross has his deep-voiced "Ugh!"
We're talking about rappers who have signature adlibs, which they use on their records.
Another person who's known for having such a sound is Jadakiss, who's high-pitched laugh is almost as famous as his verses.
He spoke about the laugh during an interview on the I Am Athlete podcast and revealed that it was never supposed to be recorded. [Jump to the 31:52-mark]
“My engineer, [Dragan ‘Chach’ Cacinovic], I think he’s from Croatia. Ruff Ryders introduced us to him, and he worked with us for years,” said Kiss. “I was recording some verses and my voice is so raspy sometimes, I’m clogged up, I would do that as a tension breaker to clear my throat and my voice before I’m about to do the verse."
“[I] never intended on him keeping it,” the rapper went on. “So I do it, I get out to come hear the verse and he kept it. I’m like, ‘What’s that?’ ‘Nah, you gotta leave that.’ I’m like, ‘alright.’ So then I just started doing it and people started loving it."