Kaimal Mashinte Mon Ellam Padichu

The dialogue "Kaimal Mashinte Mon Ellam Padichu, Kakkan Mathram Padichilla", has its root in the 1998 Malayalam movie Punjabi House. In the movie, Unni, the character played by actor Dileep, says this dialogue after being falsely accused of stealing money from the Punjabi family that he works for.
Some pre-context for the dialogue, Kaimal (played by Thilakan) is a teacher and the father of the character Unni. The dialogue translates to - Kaimal Sir's son has learnt everything, except to steal.
Movie Scene: https://youtu.be/bFVoNxuZFzI?si=S5NICZ_xSaqmLp_h&t=438
Reference

The 2024 movie Premalu also references this dialogue from Punjabi House. In the movie, the character Sachin, played by Naslen, says "Beena teacherude mon ellam padichu, pennungale valakkan ozhichu", translating to - Beena teacher's son has learnt everything, except to woo girls.
Trailer Scene: https://youtu.be/rR_2ti4l3nM?si=MHrKYx6kPgULc9dY&t=144
Usage
In conversation, people reference this dialogue to express their inability to do something, either due to incapability or integrity. Here's a template to use this dialogue, if you're looking for a fun way to say you can't do a task. "[insert name] mashinte mon/mol ellam padichu, [insert thing you're unable to do] ozhichu".