The shortening of common sayings by using the first letter of each word, and then presenting the letters in its abbreviated form. It is frequently used in the emails, the text messages, and/or references to the rockin' bands.
I can't wait to listen to the BTO (Bachman Turner Overdrive). The TCB (Takin' Care of Business) is one of my favorite songs of all the time. If you disagree, I will LOL, my friend. DYCTDOM? (Do you catch this drift of mine?) If not, my use of the acronymous slang might be confusing you. In that case, MAMF (My apologies, my fried).