An apparently well-formed English phrase with no meaning.

English phrases with infinitely many meanings.

English is noteworthy for its ability to create arbitrarily long chains of nouns, each modifying the next.  When a noun chain bites its tail, the result is a loop that can have infinitely many slightly different meanings, depending on where one starts and stops and how many times one goes around the loop.  For example, if a "toll house cookie" is a type of cookie served at toll houses,  a "toll house cookie delivery truck toll house cookie" is a more specialized type of cookie served at  toll houses where tolls are collected from trucks delivering ordinary toll house cookies.

If two noun loops are joined in a figure eight, sharing a common word, one can choose independently at each passage through the diagram which loop to follow.  The result is an uncountable infinity of distinct paths, each with a slightly different meaning.