– Well, this picture can be read exactly as it looks like. You can try reading it out loud, sometimes it helps a lot with this type of word – image puzzles. You have the word IN placed in this picture right under a string of barbed wire. So literally, this is IN – UNDER – THE – WIRE.
– To be in under the wire, or to do something under the wire, means that you do things in the last minute, you are very late, you are barely making it to an appointment or a deadline and you are doing something in the last possible second before the deadline.