This is a repost as a way to go ahead and have a reference. It was originally posted in 2015.

This word I will very likely use more often as I am in RL quite bubbly, and I get to laugh often, but not like the Sesame Street monster that laughs so much while happy that it's bothersome-Elmo....

TITTER
(NO!! I did not misspell. I never meant to say TWITTER!)

(v.): To laugh in a restrained, self-conscious, partly suppressed, or affected way, as from nervousness or in ill-suppressed amusement.

(n.): The act of making a nervous laugh that can be of any volume.

Usually if you are embarrassed, you would be likely in doing this, or you are not sure, then you would laugh this way, and by what is seen on Vocabulary.com, it is nicer than a snicker (a direct synonym is snigger.) , which you would laugh quietly but in an unkind way-likely after you say or hear something stupid about someone or something (on purpose, and more mean, but more control). Tittering is the more uncontrollable way, but more allowable.
Ranking of laughs (this would be how you would hear me laugh in intensity if I do an RP; sometimes, it can also show how polite and/or confident my laughing is...):


snort < snicker/snigger < titter < chuckle < giggle < chortle / guffaw < laugh < cachinnate (in a mean way, sometimes) / roar with laughter

Now a more colorful way of "seeing" how I'd laugh! So, I will show how eventually the levels of some feelings soon in future journals, and you will have some idea in how much emotion I have. Of course, if you have been a user on www.neopets.com, you have seen your Neopet have some levels in mood. This article is very likely what I will use when I show levels of happiness and sadness, but I will add more words for sadness and maybe one or two in happiness, and I will order them to how I feel is an appropriate level of mood: http://www.neopets.com/ntimes/index.phtml?section=374946&week=320

RP'ers, hope this helps in what feeling I'll show when I am Alfred or Cory in our RP's! Thanks for reading!