GLAAD -- the Gay & Lesbian Alliance Against Defamation -- says they've asked P-nasty to apologize for using the highly offensive gay slur ... but have yet to hear a peep from his foul mouth.
GLAAD sent us the following statement:
"We have reached out to Hilton and asked him to apologize for promoting this anti-gay slur, and we would ask media outlets to avoid repetition of the slur in their coverage of this story.
For someone in our own community to use it to attack another person by saying that it is, quote, 'The worst possible thing that thug would ever want to hear,' is incredibly dangerous.
It legitimizes use of a slur that is often linked to violence against our community. And it sends a message that it is OK to attempt to dehumanize people by exploiting anti-gay attitudes."