a term originating in State College, Pennsylvania, when two people tend to talk to each other, either in a sexual or casual manner, on a regular basis or all the time, often in public, to a point where it seems like they are making up for having sexual intercourse by talking to each other
dude 1: look at that dude and that chick over there, they talk to each other like that at this exact time every single day
dude 2: ya dude that's called speech fucking.
dude 1: i wonder when the school will make a rule forbidding that
dude 2: who knows