verb.
To emit digestive gases from the anus; to flatulate.
verb.
To waste time with idle and inconsequential tasks; to go about one's activities in a lackadaisical manner; to be lazy or over-relaxed in one's manner or bearing.
noun.
An irritating person; a fool.
noun.
(usually as "old fart") An elderly person; especially one perceived to hold old-fashioned views.