One cannot change one's nature, no matter how much time passes.

(US) (usually) a paved footpath located at the side of a road, for the use of pedestrians / (US, by extension) any paved footpath, even if not located at the side of a road

(Internet slang, text messaging) Abbreviation of mean.

(vulgar, slang) to perform fellatio / (vulgar, slang) (of a man) to masturbate