Definition
To prepare to defend against an attack or criticism.
Origins
From the practice of drawing the wagons of a wagon-train into a circle to protect against attack, and also to keep cattle and other livestock within.
How People Actually Use It
Look for protection, get defensive, get ready for an attack; from the old west where the pioneers would circle their wagons for protection from the Indians.
"Week 4 of the 08 season the Buffalo Bills came back from a losing first half, rallied their defense, and kicked the St. Louis Rams butts. They had to circle the wagons in the second half to come back and win."
Source: Urban Dictionary