Darn

"Darn" is a mild exclamation used to express frustration, disappointment, or annoyance about a situation or outcome. It’s often used as a polite substitute for stronger language, allowing someone to convey their displeasure without being offensive. For example, if you miss a bus, you might say, "Darn, I lost my chance to catch it." The term originated as a euphemism for more serious curses, and while generally mild, it effectively communicates feelings of minor vexation in everyday conversation.