Shady businessman
Imagery is used here to describe an untrustworthy and dishonest businessman:
“People will trust a reliable criminal more readily than a shady businessman.”
The word "shady" implies something mysterious or underhand, suggesting double-dealing or trickery.
The mind of an economist
In the following passage, Weir describes the "mind of an economist," using imagery to suggest that there is something threatening and troubling about it:
“I didn't want to spend any more time inside the mind of an economist. It was dark and disturbing.”
Artemis
Weir uses imagery to describe a poorer area of Artemis, describing how it is "grungy," and impoverished. This use of imagery emphasizes how Jazz is struggling for money:
“I live in Conrad Down 15, a grungy area fifteen floors underground in Conrad Bubble. If my neighborhood were wine, connoisseurs would describe it as “shitty, with overtones of failure and poor life decisions.”