It became a catchphrase, except that coming from you-know-you, it was difficult to take seriously.
In context, he was riding a motorcycle, and casually wondering what there was to be ashamed of riding a motorcycle. Most people see that as an attempt to appeal to the Mat Rempit. It may or may not be the case.
However, if one has stolen a motorcycle, there is plenty to be ashamed of.
And if one has stolen far more then that, then it's best to just hang one's head in shame and have some self-awareness, for the love of God.
Keep the mouth shut, too.