Your mother sucks cocks in hell

Famous line from the 1973 movie The Exorcist (reputed to be one of the scariest movies ever). For the network TV version of the movie, director William Friedkin overdubbed the line, so that it became 'Your mother still rots in hell'. (also, the line 'Shove it up your ass you faggot' was changed to 'Shut your face you faggot', thereby rendering it completely innocent). Although it was part of the script, the line 'I believe in the devil!' is not spoken in the movie, because actress Ellen Burstyn refused to do so. The producers then agreed to eliminate the utterance.

When NBC's Saturday Night Live (original cast) parodied The Exorcist they had Larraine Newman utter the line as "Your mother sews socks that smell!" This line got the biggest laugh of the entire sketch.

Richard Pryor was the guest host and played the lead priest.