rsts 

rather safe than sorry. Usually written with an exclamation mark.

person1: You don't have to worry about that.
person2: rsts!

rsts by Cool life February 7, 2017

RSTSOFCG 

Rocking Side To Side On the Floor Chortling Gently. You never actually roll completely over, so it doesn't qualify as a rofl.

Bill: Why did the chicken cross the road?
Sam: Why?
Bill: To get to the other side.
Sam: (rstsofcg)

RSTSOFCG by leatherstocking August 21, 2009