In Between ==> threading the needleDefinitions:1) Technical definition: to put a piece of thread through a needle2) Definition as an expression: to skillfully navigate a difficult problem (like putting a piece of thread through a needle, it has to be done very carefully and precisely)3) Billiards definition: is to precisely shoot the object ball or the cue ball through a very tight or narrow pathway to it's intended destination. (Note this is an application of definition #2, using it for billiards)
in betweena. situated in an intermediary area or on a line or imaginary line connecting two points, things, etc.b. in the way: I reached for the ball, but the dog got in between.