To make excessive usage of TLAs in written communication (especially IM and text message), in order to reduce the number of key strokes required to express oneself.
A contraction of "acronym" and "economise".
"I do acronomise heavily, but that's a function of my laziness, not wishing to type things like 'laugh out loud' in full all the time."
1. Someone who enjoys making acronyms
2. Someone who will make acronyms up as they type something because of either their lazyiness, or quick wit
Joe: lqtm
Jane: What does that mean?
Joe: Laughing quietly to myself
Jane: Oh! Thats clever. How do you know all these acronyms?
Joe: I'm an acronymist