Reprising the synonyms debate, somebody on the radio this morning was using "get" instead of "understand". "Only people who have had a stroke get people with strokes". Yuk.
The problem here is that the meaning is not immediately obvious unless one habitually uses "get" in the same way. This is what I would classify as a synonymous meaning only through a word from a clichéd phrase being extracted out of context. I think we would all understand the phrase "I get it", which I imagine derives from hippy-speak.
However, can I suggest that this usage of "get" is not in fact synonymous with "understand", but is better defined as "completely understand"?