a person or thing that excavates. 2. a power-driven machine for digging, moving, or transporting loose gravel, sand, or soil. 3. a sharp, spoonlike instrument used for scraping out diseased tissue, as in dentistry. Origin of excavator. 1805-1815.
If it is a permanent tattoo, then it would last on the bottom of your toe forever. If it's a temporary tattoo, it would probably only last a day or two.
With a new tattoo you should focus on keeping it protected while the skin heals. That means no shaving, never touching it without washing your hands first, do not scrub the area, and being generally careful with the site. Once the skin is healed completely, which can take 2-3 weeks, then it's fine to shave over it.