There is a “Special K” brand of cereal, and it’s sometimes joked that a person is so poor, he or she had to eat “Ordinary K.” “Eating ‘Ordinary K’ breakfast cereal. Meh. If only they did one that was a bit more unusual” was posted on Twitter by Simon Blackwell on February 8, 2010. “Tesco are releasing a new Value breakfast cereal. It’s called Ordinary K” was posted on Twitter on June 3, 2010.
 
“We are so poor my wife’s having ordinary K for breakfast” was posted on Twitter on June 3, 2010. “Yo mama so poor she has ordinary K for breakfast” was also posted on Twitter on June 3, 2010. Authorship of the joke is unknown.
   
   
Wikipedia: Special K
Special K is a brand of breakfast cereal and meal bars manufactured by Kellogg’s. The cereal was introduced to the United States in 1955. It is made primarily from grains like lightly toasted rice, wheat and barley. Special K used to be marketed primarily as a low-fat cereal that can be eaten to help one lose weight.
       
Twitter
Simon Blackwell
@simonblackwell
Eating ‘Ordinary K’ breakfast cereal. Meh. If only they did one that was a bit more unusual.
3:37 AM - 8 Feb 2010
   
Twitter
Steve Varty
@4EverSteve
Tesco are releasing a new Value breakfast cereal. It’s called Ordinary K .
4:23 AM - 3 Jun 2010
 
Twitter
Steeph Harrison
@craftychap
We are so poor my wife’s having ordinary K for breakfast.
5:03 AM - 3 Jun 2010
   
Twitter
Paul G
@Paul_G_UK
We are so poor my wife’s having ordinary K for breakfast.
5:57 PM - 3 Jun 2010
   
Twitter
Christian Wheel
@ChristianWheel
Yo mama so poor she has ordinary K for breakfast.
7:32 PM - 3 Jun 2010
       
Google Books
Jokes for Blokes:
The Ultimate Book of Jokes Not Suitable for Mixed Company
By Llewellyn Dowd and Phil McCracken
London, UK: Ebury Press
2011
Pg. 253:
We are so poor, my wife’s having Ordinary K for breakfast.
   
Twitter
Mike
@skatlca
Food joke: This January we���re so poor that my lass is eating Ordinary K for breakfast! http://adf.ly/4Pm9Y
2:40 PM - 26 Dec 2011
 
Reddit—Jokesuncensored
We were so poor growing up that for breakfast… (self.Jokesuncensored)
submitted December 10, 2017 by madazzahatter
...we had ordinary K.
 
The Scottish Sun (Scotland)
TAM COWAN’S SCOFF THE BALL Raise a glass to a brill breakfast at The Glass Pavilion in Broughty Ferry
This week’s restaurant, The Glass Pavilion, near Dundee, is a perfect choice for the first meal of the day
By Tam Cowan
29th April 2018, 3:40 pm Updated: 29th April 2018, 3:46 pm
(...)
(What were you expecting your rotund reviewer to say — a bowl of Special K? Sorry, too many painful memories. Growing up in Motherwell, we were so poor we could only afford Ordinary K).
 
Reddit—Oneliners
We were so poor growing up, that for breakfast, we had ordinary K.
submitted May 23, 2018 by madazzahatter