To do "The Crouch" is to do a version of the robot dance. It got it's name following it's use by the professional footballer (soccer player for all you yanks) Peter Crouch who has taken it as his trademark goal celebration. What makes it different to the robot and has given it cult appeal is the size of Peter Crouch. The player is 6,6" tall and very slim so when he does the dance it makes for extra commical effect.
"When Crouch scored last night did you notice everyone in the pub doing The Crouch too?"