All are off limits with the exception of sucks, which I discourage but will not scold for.
Regarding gay, there is no discussion of sexuality in my classes, period. So in fairness, I have never 'banned' it because it has never come up. I have no clue of the gender preferrences of my students and frankly do not care to know, so pejorative terms in that regard will be greeted with a healty serving of knuckle pushups if it ever comes up.
If a technique is being done incorrectly or poorly, there is proper terminology to describe the errancy of the technique and I expect those in class to use it.
If they want to talk like middle schoolers, they may do so on their own time. There is really no good reason for any of the quoted terminology to be used in a martial arts setting.
I consider mainstream television programming to be neither polite nor acceptable for the most part and certainly not a barometer of what is polite or acceptable. Mainstream television airs mostly "reality" programs that highlight bad behavior and insipid talk shows that display the absolute worst aspects of human behavior in the guise of dialogue.
Turning off the television would vastly improve our nation in and of itself.
Daniel