Permanent Head Damage (“Ph.D.” backronym)

Does studying for a Ph.D. (doctorate) degree cause head damage? The “Ph.D.” backronym (back acronym) “Permanent Head Damage” has been cited in print since at least 1991, when it was posted on the newsgroup soc.culture.filipino.
   
Other Ph.D. backronyms include “Papa Has Dough,” “Piled Higher and Deeper,” “Pizza Hut Deliveryman,” “Poor, Hungry and Determined,” “Poor, Hungry Doctor,” “Poor, Hungry and Driven”  and “Pretty Huge Debt.”
 
The Bachelor of Fine Arts (B.F.A.) degree is sometimes called “Bachelor of Fuck All.” The Bachelor of Science degree is frequently called B.S. (“bull shit”) and the Master of Science degree is called M.S. (“more shit” or “more of the same”), with both referenced in print since at least 1932.
 
Popular backronyms for the M.B.A. (Master of Business Administration) degree include “Massive Bank Account,” “Master Bullshit Artist,” “Mediocre But Aggressive” and “Mediocre But Arrogant.” M.D. (Doctor of Medicine) degree backronyms include “Money Doctor” and “Much Deeper.”
             
   
Google Groups: soc.culture.filipino
WAS: Re: Science Education in the Phil NOW:Academia jokes
Maria Emerita Muyot
8/9/91
(...)
Also, according to a friend: Ph.D. = Permanent head Damage 😊
-Ching, Ph.D.-to-be  
 
Google Groups: rec.humor
Request - What does Ph.D. stand for?
Lawrence CHONG
10/25/92
Ph.D = Permanent Head Damage
     
Google Books
Gathered by the River:
Reflections and essays of women doing ministry
By Gertrude Lebans
Dundas, ON: Artemis Enterprises; Toronto, ON: United Church Pub. House
1994
Pg. 27:
When Hyun Kyung Chung, feminist Korean theologian, recently delivered an address to a group of women on the Queen’s University campus, she referred to people with Ph.D’s as having “permanent head damage”.
 
Twitter
OhMyMedia
@maomy
Ph.D= permanent head damage=永久性脑残
8:32 AM - 17 Mar 2008
   
Twitter
~manasa~
@manasamel
PhD - Another form of Permanent Head Damage :D
2:17 AM - 21 Apr 2008
   
Google Books
Cracking a Ph.D.:
Revelation of 5 Stages in Doctoral Journey
By Lindawati
Singapore: Springer
2017
Pg. 3:
Some may say that Ph.D. equals to “Permanent Head Damage” while others say that Ph.D. students and graduates are too serious, too “nerdy,” of too weird.
 
Twitter
SNGenie
@SNGenie
According to my prof, PhD stands for:
Partial Head Damage (when studying)
Permanent Head Damage (after graduation)
😂😂😂
11:46 PM - 20 Oct 2018