The Supreme Court has barred Senior Counsel Ahmednasir Abdallahi and associates of his law firm from making submissions before the court.
In a statement on Thursday, the apex court said the lawyer has "relentlessly and unabashedly... scandalized and ridiculed" it.
"In view of the foregoing, it is the decision of this Court, that henceforth and from the date of this communication, you shall have no audience before the Court, either by yourself, through an employee of your law firm, or any other person holding brief for you," the statement read in part.
The lawyer immediately rebuffed the statement signed by Registrar of Supreme Court Letizia Wachira terming the ban "a badge of honour".
The top court said whilst the decision is bound to affect litigants who had already sought the senior counsel's legal services before the Court, "it is untenable that you would seek justice in the very institution and before the very Judges, whose reputation and integrity you never tire in assaulting".
The court accused the lawyer of conducting a campaign in the broadcast, print and social media accusing it and its judges of corruption, incompetence and outright bribery.
"This, you have done with reckless abandon, paying scant regard to the reputations of those who tirelessly serve on the Court in accordance with their Oath of Office," the court said.
The court said it reached the stern decision owing to the fact that it had previously cautioned the lawyer to tread carefully and restrained itself from taking punitive action against him but he remained unperturbed.
It cited its ruling in the case of Republic v Ahmad Abdolfadhi Mohammed and Anor, SC Petition No. 39 of 2018, which Ahmednasir criticised the court over its verdict.
"You were cautioned that such conduct would in the future, not go unpunished. The caution as recorded in the ruling above, appears not to have had any sobering effect upon you," the court said.
The court pointed out that regardless of his sustained and unsubstantiated attacks against the court and its judges, the lawyer still sees no contradiction in filing cases before it.
It said the lawyer's insensitivity and abusive arrogance cannot be said to be driven by his quest for Justice.
"Attached to this communication is a compilation of some of the statements that you have personally been generating against the Court, its leadership, and membership over the years," the court said.
It explained that the compilation serves as a point of reference for anyone seeking to validate or challenge the gravity of the court's action.