skin-deep—
1. involving a surface only:
- We sent for a doctor … and on his examining Pagolo, we discovered that the wound was only skin-deep.
2. having little substance; superficial:
- The technical reviews of digital cameras are skin-deep compared to the in-depth reviews by the online photography sites.
skinny dip —(a consonant nominal phrase) bathing or swimming in the nude:
- “Fancy a skinny-dip?” I giggled, gazing at the crashing waves.