(informal) A dilapidated area of a city where many people live in a state of poverty and in which crime is more common than in other portions of the city.

(UK, informal) To quarrel; to cease to be on friendly terms.

To do one's fair share of work, or take one's share of responsibility.

plural of part-time bowler

(idiomatic) Synonym of play a part

(idiomatic) to show support for or defend the actions of someone in the course of a debate, argument, etc.

plural of part-whole model

(education) A simple tree-like diagram showing the relationship between a whole and its parts, used in teaching mathematical concepts such as fractions.

It is often wise to refrain from seemingly brave speech or action.

(US) Alternative spelling of discretion is the better part of valour