It's when a man goes from the vagina to the anus in one quick motion without warning his partner.
I was changing lanes without signaling on Renee in the shower and she went deaf for a minute.
by intelinside August 5, 2010
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When you go from vaginal sex to anal sex without warning the girl. Must be done in a quick fashion.
Jake : Hey did you end up changing lanes without using your signal on that chick last nite?

Steve : yes sir. she said she didnt like anal but she got it anyways.
by switchbladejake August 18, 2008
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