diff --git a/lisp/lib/rb-hack.el b/lisp/lib/rb-hack.el
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+;;; rb-hack.el --- Utilities for hacking/debugging -*- lexical-binding: t -*-
+;;; Commentary:
+;;; Code:
+
+;; By @xuchunyang https://emacs.stackexchange.com/a/24658/38136
+(defun rb-advice-unadvice (sym)
+  "Remove all advices from symbol SYM."
+  (interactive "aFunction symbol: ")
+  (advice-mapc (lambda (advice _props) (advice-remove sym advice)) sym))
+
+(provide 'rb-hack)
+
+;;; rb-hack.el ends here