(idiomatic, vulgar) To take a big risk.

plural of ace up one's sleeve

(idiomatic, vulgar) having an excessively high opinion of oneself.

(idiomatic, usually followed by at) To regard as inferior or distasteful; to hold in contempt.

(idiomatic) Alternative form of punch below one's weight

(idiomatic) Alternative form of punch above one's weight

(idiomatic) To achieve or perform at a level lower than should be expected based on one's preparation, attributes, rank, or past accomplishments.

(idiomatic) To (attempt to) achieve or perform at a higher level than would be expected based on one's preparation, attributes, rank, or past accomplishments.

(idiomatic) Relaxed and confident in one's manner of presenting oneself and interacting with others; conveying the impression that one has a clear, satisfying understanding of one's own abilities and situation.

Alternative form of throw one's hat in the ring