an insensible person with no practicality what so ever and needs to do what she is told because then she looks like a complete fool. a shevi will be very spontanious and makes bad decisions like wasting money on things that do not last very long. a shevi looks quite asian and acts very asian at times to. a shevi will tell you that that "to" in the last sentence is supposed to be spelled "too".
Don't you dare pull a shevi on me you irresponsible, abnoxious, ignorant fool.