Mostly this is for making people laugh at two in the morning. Post a common idiom or saying, preferably misusing it in a way that's subtly humorous. For example: I could care less what you put in this thread.
It don't mean a thing if it ain't got that je ne sais quois. (stolen from the awesome classical music radio show Shickele Mix)
im sweating pigs lol my grandma used to say this and i would always thinlk of pigs poping out of her pores hehehe im crazy af.