The flashy advertisements and an adrenaline-inducing test drive convinced Lisa and she impulse-bought an Italian super car

[alpacinou]

I want to say someone bought something without considering different aspects of purchasing it. Can I use 'impulse-buy'? Is this correct and natural?

The flashy advertisements and an adrenaline-inducing test drive convinced Lisa and she impulse-bought an Italian super car, even though it was way beyond her budget.

 

[Tarheel]

That would, I believe, be an entirely new verb. In any case, you already have "impulsively bought", which would make perfect sense there.

 

[jutfrank]

Since you've creatively coined an original compound verb, it's just about as unnatural as you can get. Still, the meaning is perfectly clear.

After many years of reading your questions, I still don't really understand what you want us to do. You're obviously interested in using the language creatively, so why do you insist on asking us whether what you say is 'correct' or 'natural'? Why don't you just ask us if we think your writing is any good?