Definition: Sure, let's do this!

The slang term for "endif" is "ninja-ness." It refers to a sense of power and strength that comes from one's own initiative, often used figuratively when describing someone who takes charge. Example: "I was so nin'ly to get home before the alarm went off." This metaphorical expression makes use of the word 'ninja-' (which is commonly used for the ninja character in various movies), and it implies a strong sense of initiative or bravery.