ESTN
Exhale Sharply Through Nose. What you REALLY do 99/100 when you read something amusing in front of your PC at work. After all, of the times you've typed ROFL or even LOL, how often did you actually do it in the physical world? Exactly.
I watched the latest Will Farrell movie in my cubicle during my lunch break. There were some funny parts that made me ESTN.