Get out ion you can. Maps by the Spanish who settled California in the 1700s and early maps after it became part of the US often noted topographical areas throughout the state which became "swampy" during the rainy season as "salsipuedes" as warnings to travelers entering those areas that muddy conditions might make it difficult to exit.
Synonyms of salsipuedes are no exit dead end swampy impassable
Antonyms of salsipuedes are through street
Used in US as well
"During the rainy season a salsipuedes was an area that became so muddy that it might make it difficult to exit."
It is a street that will be cut off by the wall of the city, so whoever comes in it can not go on the other side: you have to retrace their steps, hence it's " you enter, and salt, if you can ". As name exists in many localities that had walls, although today the Street exit, once demolished the wall.
