vulgar person, country man
傖 centers on a rough, uncultured person: a vulgar individual or a rustic country man lacking refinement.
傖 combines 亻 (person) with 倉, which likely contributes the sound and may relate to a storehouse or granary, suggesting a coarse, unrefined person from the countryside.
A person 亻 beside a storehouse 倉: imagine a rough country man loitering by a barn, looking vulgar and uncultured.
For ショウ, picture a show-off country man bragging loudly by the storehouse: show -> ショウ, and his vulgar behavior fits the meaning.