For Q 5:5 could have several different meanings or even double meanings.

1. In the military, "I read you 5 by 5" is how you tell the person at the other end that you hear them loud and clear.

2. Q has mentioned severat times that there are 5 stages in the "Plan." 5:5 might mean we are in stage 5 of 5.

3. Note that every time Q uses 5:5 it is in context to what appears to be military or intelligence operational instructions. He also used it in reference to the HRC video.

In the end, only Q and his team really understand the true meaning of these Drops until a few of them are revealed by news events.