Grady Wilson is the name of a fictional recurring character on the NBC sitcom Sanford and Son played by Whitman Mayo.
Grady is portrayed as an elderly man, known for his stooped appearance and his gray hair and beard.
He is sometimes referred to by Fred as "Crazy Grady" (a nickname that would be referenced in the 1996 pilot of Malcolm & Eddie).
He is often easily alarmed or surprised, and when excited, he is known to exclaim his catch phrases, "Good goobily goop!"
[1] Grady also has a habit of being easily upset, usually when complimented, accidentally offended or hearing of illness or impending death striking a friend, sobbing uncontrollably and blowing his nose loudly (Fred often responds to this by telling him irritably "Don't do that, you gonna blow somethin' outta your head that you need!")