This AskReddit thread took things a different direction in the usual, pickup line-riddled forum, to instead consider the most brutal, creative approaches to cutting things off with someone. The ensuing "breakup lines" are so cutthroat that you might catch yourself laughing, cause you don't know what else to do. 

Text - Dan TheFryingPan 10h If you're speaking on Facebook messenger. Her: "knock knock." Him: "Who's there?" Her: "You can no longer." Him: "you can no longer who?" You can no longer send Direct Messages to this person