There were a lot of lines from Violet in Osage County that I adored. I forgot most of them unfortunately except for "There's an indian in my attic!". That line was great but really only works in context. There were many other better ones that I just can't remember.
Other than that, there were many lines from Xanadu. They are pretty well known but was (and this may not be the exact wording) "Oh please, next door at Gypsy, Patti Lupone hasn't even alienated her first daughter yet." That also really only works in context. Aside from that, the use of language was pretty funny. For example, this is another common one but "Oh snapeth" was great.
"Perhaps, when we remember wars, we should take off our clothes and paint ourselves blue and go on all fours all day long and grunt like pigs."
Kurt Vonnegut, Cat's Cradle