Is it deer resistant?

Yes

Japanese Skimmia is deer resistant.

Skimmia japonica

Deer: Rarely
Height: 7 ft (2.1 m)
Spread: 5 ft (1.5 m)
Zones: 6–9
Light: Partial shade

Shrub

Japanese Skimmia (Skimmia japonica)

Photo: Qwert1234 · Public domain

More details

Light: Partial shade, Shade
Water: Medium
Type: Shrub
Maintenance: Low
Growth: Slow
Bloom: Spring
Foliage: Evergreen
Features: Flowering, Poisonous
Best uses: Border, Container, Foundation, Hedge, Lawn, Patio, Privacy, Slope