-noun. pronounced blek- chur
A long-winded lecture by anyone whose name starts with a B. This lecture will usually start off with the intent of answering a 'simple' question, or explanation. The person on the receiving end is usually a captive listener either talking to their boss, parent, or other authority figure.
Ironically, as long-winded as this definition is it also can be classified as a blecture if the person publishing it had a name starting with the letter B.