Shared Meaning Working on pithy.
Meaning is shared only insofar as the context demands. Even words that seemed to create shared meaning in one context may, when used in a different context, demonstrate that the meaning was never shared to begin with.
Yelling "slab" may get a house built, but it could just be that in the context of a construction site, it was sufficient for the yeller to mean "hand me what is next on the pile" and the receiver to have understood the word to mean "hand me the hard rock thing cut into a manageable shape."
I suck at pithy.