1.Lit. to box with someone for practice. The champ needs someone to spar with every day. Ted was sparring with his brother when the phone rang and saved him from further exertion.
2.Fig. to argue or quibble with someone. I think you really enjoy sparring with people just to irritate them. stop sparring with me! I am not here to argue.
An individual with whom one enjoys arguing, as in Jim's my best sparring partner. This expression alludes to boxing, where since about 1900 it has denoted the person one practices or trains with. [Mid-1900s] Also see spar with.