Vocabulary

ਨਾਜਾਇਜ਼
najayaz

illegitimate, wrong, shady (from Urdu/Arabic najaiz)

adjective
In this song
High End · Diljit Dosanjh
Verse 1
ਨਹੀਓਂ ਕਰਦੇ ਨਾਜਾਇਜ਼ ਗੱਲਾਂ ਵੱਡੀਆਂ
nahiyo karde najayaz gallan vaddiyaan
But never does anything shady, no matter how big