To remain optimistic and maintain courage during difficult times; to stay positive despite adversity.
This phrase relates to body language and posture - when people are sad or defeated, they tend to lower their heads and chins. Keeping one's chin up literally means maintaining good posture, which has long been associated with confidence and resilience. The phrase became popular in the early 20th century.
This advice works on both psychological and physiological levels - research shows that maintaining upright posture actually can improve mood and confidence. It's a perfect example of how physical actions can influence mental states, making this more than just a metaphor.
Complete word intelligence in one call. Free tier — 50 lookups/day.