Hİ..İ NEED YOUR HELP.ALTHOUGH İ HAVE SEARCHED SOME İDİOMS,İ HAVEN'T FOUND MEANS
Depending upon the context, a "straight edge" usually refers to a ruler or protractor or other device that allows you to draw a straight line.
-hitch in his giddy-up
A very stylized way of walking. It can mean that he is holding his shoulders square and his chest is thrust out proudly, or that he has a "spring" in his step.
Depends upon the context, but usually refers to an elected officeholder or group continuing in office during the period between failure to win an election and the inauguration of a successor.
Again, depends upon the context. Can be taken literally, as in "they dug deep down into the ground," or can refer to someone's innermost feelings - "Deep down in his heart, he knew that stealing was wrong, but his family was hungry and he had no money."