It Means Continue Mission. Usually said after an interruption or hiccup in whatever you're doing. This phrase is derived using the phonetic alphabet (Military Alphabet). Instead of saying Continue Mission, Charlie Mike is said instead so everyone over the radio can understand and know what you mean.
By using the first letter of each word and converting that to the Military Alphabet you get the phrase charlie mike.
C = Charlie
M = Mike
An abstract spoken method to point out the presence of someone who looks like a "child molester" to friends while still remaining unoffensive. Based on the military phonetic alphabet for the letters C and M.
When uttered by one or both parents in any situation to warn of possible danger, give clock direction and Charlie Mike and get accountability of children.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.