Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
Exterminator of shame; i.e., of idols.
Some years after this, when David had subdued all the adversaries of Israel, he began to think of the family of Jonathan, and discovered that Mephibosheth was residing in the house of Machir. Thither he sent royal messengers, and brought him and his infant son to Jerusalem, where he ever afterwards resided (2 Sam. 9).
When David was a fugitive, according to the story of Ziba (2 Sam. 16:1-4) Mephibosheth proved unfaithful to him, and was consequently deprived of half of his estates; but according to his own story, however (19:24-30), he had remained loyal to his friend. After this incident he is only mentioned as having been protected by David against the vengeance the Gibeonites were permitted to execute on the house of Saul (21:7). He is also called Merib-baal (1 Chr. 8:34, 9:40).