血の巡り
ち
の
め
ぐ
り
Meanings
1
blood circulation
Literal physiological sense; often used in set phrases like 血の巡りが良い/悪い.
Exercise improves blood circulation.
2
quickness of mind; apprehension
Figurative extension from blood circulation; almost always used in the negative phrase 血の巡りが悪い to mean slow-witted or dense.
See also: 血の巡りが悪い
He's slow on the uptake and doesn't get jokes.