Most larking is a phrase used to describe someone who is playful, mischievous, and full of fun. Antonyms for this phrase would be serious, dull, and mundane. People who are serious are often perceived as being more reserved, less interested in being adventurous and less inclined to take risks. Dull refers to a lack of excitement or engagement with the world, often characterized by boredom and mediocrity. Mundane life is one where there are no surprises, where everything is predictable and routine. Antonyms for most larking are often employed to describe the opposite end of life's spectrum- one that lacks spontaneity and excitement.