The word "lude" is a slang term that refers to a sedative drug called Quaalude. It is usually used to describe a powerful and highly addictive substance that can cause relaxation, drowsiness, and impaired motor functions. Full definition
Topics inc lude: the basic computing environment (hardware and operating systems); programming language concepts; program design; data management, data st ructures and implementation; software tools; workflows, version control, and reproducibility; generic analytical techniques (relational algebra, graphical analysis, visualization, etc.); and specific characteristics of environmental information. (bren.ucsb.edu)
And to «forgive» a parent who still slings the occasional lude comment every once in a blue moon visit is just impossible. (nakedpastor.com)