1. to be missing London while one is away

2. sypmtoms often associated with those of homesickness- but does not require one to have permanently resided in London

3. sometimes, but not always, a result of wanderlust

4. an incesant, inexplicable need to return to the the city on the Thames

5. pure. simple. sanity.

When you eat dirt for the first time and leave your family to build a shack in the woods