The expression is rather widespread, especially among the 1910/1920's generation of the Upper Great Lakes region (Ontario/Michigan).

The full expression is "My sufficiency is suffonsified and any more would be obnoxious to my fastidious taste."

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The phrase "sufficiently suffonsified" is a playful and whimsical expression that does not have a specific origin in any historical or linguistic context. It appears to be a made-up or coined term that likely originated in a humorous or creative setting. The term does not have a formal definition or meaning in standard English language usage.

My father used to use the expression after a good meal: "If my sufficiency was suffonsified any more it would be obnoxious to my capacity." I have no idea where he got this from, but it has been a household saying in our family since the early 1960's. Carol