Are you :
I may be thought dishonest
Plagiarism constitutes an act of academic dishonesty
But I’m often spoken over
Lots of people already used that before, and it is still being used
And you may not understand the words
Plagiarizing is sometimes done in hast, thus leading to the plagiarist not understanding all of the work he is plagiarizing
By another name, I would place my weight on you
You can give another name to the original author's one to refer to his work
Or at least allude to your work.
You can include a citation, thus giving credit to the original author, even if a citation might not be enough.
You must pick me
Can't find something for this line...
Or later, give me a bow
If the plagiarism comes successful, then you have to thank it (that basically comes down to thank yourself).