(idiomatic) To lose one's special mastery of or knack for a particular skill or activity.

(idiomatic) To withdraw, especially in a discreet manner; to disengage; to quit.

(idiomatic, dated) To get back to the business at hand.

An autobiography

To move one's head from side to side, in a repeated swiveling motion from the neck, to indicate disagreement, negation, disbelief, disapproval or dismay.

(sports, of a competitor) Playing or competing below one's usual level of performance.

(slang) The condition of being agitated and constantly fidgeting. / (slang) The condition of being sexually excited.

To expel mucus or other matter from one's nasal passages, via one's nostril, by force of lung power.

(US) Milk containing one percent butterfat.

(idiomatic) To make the greatest possible effort.