Dick In A Jar Syndrome. Edit Meaning

1.

The unfortunate effect of being placed into the "friend zone" or "just a like a brother to me" zone by a potential romantic interest. Upon full maturity of the disease, the person is used in a "break glass in case of emergency" type booty call and then discarded...

There is a very fine line between being chivalrous and ending up with a case of "dick in a jar" syndrome.

See dij, friend zone