A step parent is someone who assumes the role of parent, is married to one of the biological parents, and is not a biological parent. Sometimes this person is more of a parent to the child than the biological parent, sometimes this person is not.
My biological dad's fourth wife is my step mother. The guy I call dad is my biological mother's second husband.
by taraneh October 19, 2004
someone who trys to act like you real parent. They treat you like trash most of the time. You other parent (the one that remarried)does not care how this person treats you.
My step-parent trys to act like his is my real dad, but he is a nothing but a no good asshole
by Lisa October 10, 2004
A parent that marrys someone in whom he or she falls in love with, who after being tortured with no sex, has to deal with the offspring of another while they tear the neighbohood apart with the protection of the biological parent.
Justin, my stepson...........
by MASTERBLASTER February 13, 2005