knock around

intransitive verb

1. to strike a blow or blows with the fist or some hard object; esp., to rap on a door
2. to bump; collide; clash
3. to make a thumping, pounding, or rattling noise: said of an engine, etc.
4. ☆ Informal to find fault; criticize adversely
5. ☆ Gin Rummy to end a deal by exposing one's hand and showing a surplus of not more than ten points in unmatched cards

transitive verb

1. to hit; strike
2. to make by hitting or striking: to knock a hole in a wall
3. ☆ Informal to find fault with; criticize adversely

noun

1. the act of knocking
2. a hit; sharp or resounding blow; rap, as on a door
3. a thumping or rattling noise in an engine, etc., as because of faulty combustion
4. ☆ Informal an adverse criticism
5. Informal a misfortune or trouble: the school of hard knocks