Duke Nukem is an American hero and worldwide cultural icon who has repeatedly saved Earth from armies of hostile robots, alien invaders, and mutant pig cops. He is the flagship character of an entire franchise named after him.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...