KDE literally comes with a manual. Hitting f1 almost anywhere will give you a help tool that explains everything in detail.

Just want to remind everyone that the point of this scene is that Draper is an unstable and insecure man that is actually obsessed about how everyone around him are perceiving him, all the time. So this line is just stupid bravado, because he thinks the phrase projects the image he wants others to have of himself. He is lying because he actually thinks about what others think of him constantly. He works in advertising ffs.