“Yo mama is so dark, she went to night school and was marked absent”

A popular “yo mama” insult “so dark” joke is:
 
“Yo mama is so dark, she went to night school and was marked absent.”
     
The joke was posted on the newsgroup rec.humor on April 19, 1993.
   
   
Google Groups: rec.humor
WANTED MAMA JOKES
Eric
4/19/93
(...)
5. Your mama’s so dark she went to night school and was marked absent.
 
Google Groups: rec.humor
Yo Mother’s so… List?
Bill Boxall
8/24/94
(...)
Yo momma so dark she went to night school and was marked absent.
     
Google Groups: rec.humor
Canonical List of Yo Momma jokes
Price Charles
12/4/94
(...)
Yo momma so dark she went to night school and was marked absent!
 
Twitter
Jayy Starr | GreenHairedGirl
@JayyStarr
Replying to @Tyrese
@Tyrese4ReaL Yo mama so black, she went to night school and was marked absent.
7:10 PM - 18 Mar 2009
   
Twitter
KD Holt
@KD_Holt
Replying to @giannilee
@giannilee Yo mama so dark she went to night school and was marked absent! xcapes via laugh truck….LAJ
9:41 PM - 7 Apr 2009
 
Google Books
Sensible Nonsense.. Frank’s Comic Pack:
Humour Pack Series
By Frank Paul
BookBaby
2014
Pg. ?: 
Yo mama so dark she went to night school and was marked absent!
 
Twitter
Lucky Score
@LuckyScoreNet
Yo mama so dark she went to night school and
was marked
absent!
#Joke from #YoMommaJokes in #Jokes, #Humor and #Satire
4:23 AM - 5 May 2018