the.com/traps
The muscles that turn a shrug into a personality trait.
means The trapezius — a broad, kite-shaped back muscle that moves your shoulders, neck, and head.
from From Latin trapezium, a four-sided shape, because anatomists thought the paired muscles formed a diamond across the upper back.
Shape sourceNamed for its geometric diamond outline.
Three partsUpper, middle, lower fibers do different jobs.
Shrug dutyUpper traps lift shoulders toward the ears.
Slang twistAlso short for drums, or street code.