The act of talking about and shading one of your closest friends to someone else. Most probably because they've gotten on your nerves, or are acting stupid.
A filler. The person that fills another's need or want for fun in a non relationship manner. Someone to fill the space until another person comes along.... No ties, No emotion, No expectations.
She/He..... Is a filler. Good enough for fun..... Never a person I'd keep around or engage in life with. "A Toy" a "Friend for Fun".