'r

suffix added to the end of a verb or other type of word to transform it into a noun, as one ‘doing’ the verb, sometimes not taken entirely literally; equivalent to tagging on an ‘-er’{hyphen included}, though consumes less space and takes less time to type, plus looks cleaner for ‘irregular’ and acronymic verbs which may not stand as a verb when alone, though when an ‘'r’ becomes its ending it takes on a somewhat colloquial meaning.