Sorry sir, the modern definition is "foolish or stupid"

"Many aspects of society have inherent ableist values. Commonly used phrases such as "insane", "retard" and "crazy" used as insults is an example of ableism in the English language. The Spread the Word to End the Word campaign is set up with the goal of eliminating ableist language that is exclusive, offensive and derogatory toward people with disabilities and promoting more accepting attitudes for all communities."