“Yo mama is so stupid, she plays solitaire for cash”

Solitaire is a card game for a single player. A popular “yo mama” insult joke is:
 
“You mama is so stupid, she plays solitaire for cash.”
 
“Plays solitaire…  for cash” was listed under “Expressions for stupidity” on the newsgroup rec.humor on March 11, 1992. The expression is dated because there are several computer solitaire programs and websites.
       
   
Wikipedia: Patience (game)
Patience, or solitaire as it is known in the US and Canada, is a genre of card games that can be played by a single player. Patience games can also be played in a head-to-head fashion with the winner selected by a scoring scheme.
 
In the US, the term solitaire is often used specifically to refer to solitaire with cards, while in other countries solitaire specifically refers to peg solitaire.
         
Google Groups: rec.humor
Expressions for stupidity
Alfvaen
3/11/92
(...)
Plays solitaire…  for cash.
 
Google Groups: rec.humor
expressions for stupi 2/2
ron kulick
12/4/92
(...)
Plays solitaire…  for cash.
 
Google Books
Internet Insider
By Ruffin Prevost
Berkeley, CA: Osborne McGraw-Hill
1995
Pg. 268:
Plays solitaire. ..for cash.
 
Google Groups: rec.humor
MORE INSULTS???
Roths
2/19/96
(...)
You’re so dumb, you play solitaire…for cash.
 
OCLC WorldCat record
Playing solitaire for money
Author: Adrian Slatcher
Publisher: London : Salt Pub., 2010.
Series: Salt modern voices, no. 2.
Edition/Format:   Print book : Poetry : English
 
Twitter 
Yash
‏@NotYoshi
You are so dumb, you play solitaire… for cash.
5:50 AM - 1 Jul 2010
 
Google Books
The Mammoth Book of Insults
By Geoff Tibballs
New York, NY: Constable & Robinson, Ltd
2011
Pg. ?:
Yo Mama’s so stupid she plays solitaire for cash.