(idiomatic) To think, especially in a careful or clever manner.

(idiomatic) To think carefully, especially as an alternative to being guided by one's emotions. / (humorous) To headbutt.

(idiomatic) To continue with a menial, tedious, or time-consuming task.

(idiomatic) To relax and enjoy oneself without restraint. / (idiomatic) To cease to care about one's appearance, allowing oneself to become unkempt, overweight, etc.

(idiomatic) in a no-win situation.

plural of ace up one's sleeve

Alternative form of keep one's head

Alternative form of keep one's head

(informal) Of a person: to gain weight quickly.

(slang, Canada, US, vulgar) To work very hard, to put in a lot of effort. / (slang, vulgar) To hurt or beat up.