"Praji" (or Paa ji) in Punjabi is a term of respect used to address or refer to big brother or an elder male figure. It's a common way to show respect and acknowledge someone's seniority.
Essentially, it serves the same function as "brother" or "elder brother" in English when used to show respect. It's not just limited to blood relatives; it's often used for any man older than the speaker to show politeness and respect.
