Knock Yourself Out (Idiom) ft. Stephen from Send7 Podcast

The phrase 'knock yourself out' is an informal way of giving permission or encouragement to someone to do something. It is equivalent to telling someone to go for it or go ahead. It is commonly used in American English and implies a casual and relaxed attitude towards giving permission. Although the speaker indicates that they might use it with close friends, it is associated more with American language and culture.