Top Definition
Ketchonnaise is a difficult recipe to follow for the most delicious sauce imaginable. Its a combination of Ketchup and mayonnaise. One must play around with the mayo and ketchup levels to find the perfect Ketchonnaise consistency. Some may call it Mayup. This is a slag term, similar to "mayo", and should not be formally used.
-Hey man, I dont know what to put on my sandwich. I can't choose which sauce to use, Mayo or ketchup.

-I got some pre-made Ketchonnaise in the fridge, bro. SO good.
by JamesJC April 12, 2010
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