A Chopper is a modified motorcycle
Hello DonQuixote123, welcome to the forum.
Technically speaking (according to the Dictionary) chopper" is not an acceptable term for helicopter.
You do hear it often from someone outside of the industry (who maybe is trying too hard to sound cool).
Personally, I cringe at the sound of that word when used in place of helicopter, aircraft, Helo, or even ship or "bird," all of which I prefer.
I find that in countries with hmmm, how shall I say it?- less developed aviation resources, and where English is not the primary language, the word at question, I don't even want to type it, flies around (pardon the pun) quite a bit.
In a particular country known to some as the Sub-continent, it seems to be the word of choice when referring to a helicopter and worse yet pronounced "choppa."
Anyway, I don't mean to go on, but have been following your posts and think the world would be better offer with less "choppers" muttered.
Of course, at the end of the day, it's no big deal.
Good luck with all your future aviation endeavors.