1. Acronym standing for 'ass shit da fuck'.
2. Four letters on a QWERTY-keyboard that are in a convenient row, and are thus easy to type for the purpose of spamming, receiving attention or expressing anger.
1. Guys, this chat is dead asdf asdf asdf...
2. No Ilost! asdf asdf asdf asdf...
Expression used as a placeholder for a variable name in the interest of minimizing time spent naming, as well as to minimize the time elapsed mechanically actuating the keys of a QWERTY keyboard whilst using the left hand positioned in the home row of the keyboard. Often considered to be a negative code smell and associated with sloppy programming. Patent pending.