Online, is there any equivalent to the Japanese web slang of ending a sentence with "w" or in English using "lol" just to indicate good-nature/humor?
The best i can think of is 233.


  It is originated from Chinese popular forum side 猫扑, the 233 is the number of emoji. Then it started to get viral to other forum side, people often lengthen the 3 behind the 233. The longer the 3, the funnier it gets to.


No.233 emoji is a dog having the face expression of >_&lt; , see below picture:



You would have something like this: 

233333333333333333333333333333333