I have never seen the term being used in programming (for code) this way to refer to spaghetti code. Unless your definition caught on, using it that way would just confuse people, because copypasta already means something else.
I concur that this is an interpretation I encountered, that is bad copy/paste of possibly good code (often from stackoverflow) that results in spaghetti/pasta code, due to pasted code not being reformatted/refactored to fit surrounding code.
To be clear: specifically when copy-pasting, just particularly when the code is already spaghetti. (Because who commits just one sin?) The copy/pasting is the critical element.
