A quick switch from vaginal to anal penetration or vice-versa.
I surpised her with a sudden lane-change in return for snowballing me the other night.
by Napoleon Bonerhard November 15, 2006
When fucking a girl you pull out and skeet on her face making a dashed white line down the middle of her face, you then slap one side of her face with your cock, then before slapping the other side you declare "LANE CHANGE!"
Julien declared a "LANE CHANGE!" as he slapped Kate the hooker on both sides of her face after he made a dotted line, accidentally getting some in her nose.
by The Lane Changer November 06, 2010