[know one in high places] {v. phr.} To be connected with […]

[know one is alive] {v. phr.} Not to notice a person. […]

[know one's onions] {v.} To be well acquainted with a subject.

[know one's own mind] {v. phr.} To not hesitate or vacillate; […]

[know one's place] {v. phr.} To be deferential to one's elders […]

[know one's way around] or [know one's way about] {v. phr.} […]

[know something inside out] {v. phr.} To be extremely well conversant […]

[know which side one's bread is buttered on] {v. phr.} To […]

[knuckle under] {v. phr.} To do something because you are forced […]

[labor under] {v. phr.} To be the victim of; suffer from. […]