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This technique is also used by preeteens and other people who haven't quite figured out how to flirt. From personal experience, some examples might be: teasing, ice down the shirt, pulling pigtails, stealing schoolbooks, making faces, stealing jello at lunch, etc...

From Bill Wattersons excellent comic strip, Calvin and Hobbes:

Susie: HEY, CALVIN! Are we near a slaughterhouse, or did you forget your deodorant?!
Calvin: DROP DEAD, SUSIE! You're so ugly, I hear your mom puts a bag over your head before she kisses you goodnight!!

Calvin: It's shameless the way we flirt.