Chuckling silently to myself. Used similarly to lol, but when you're not actually laughing out loud.
by [0SC]Just John December 26, 2008

Chuckle Silently To Myself
"Lol" is an often misused term. Many people write "lol" when they don't actually laugh out loud. In reality, the term "cstm" is a more accurate description of the virtually silent noise that escapes one's airway when viewing or hearing something of a semi-hilarious nature. This aim of this term is to make society more honest about the nature of its reactions.
"Lol" is an often misused term. Many people write "lol" when they don't actually laugh out loud. In reality, the term "cstm" is a more accurate description of the virtually silent noise that escapes one's airway when viewing or hearing something of a semi-hilarious nature. This aim of this term is to make society more honest about the nature of its reactions.
by therealburninator March 28, 2009

by unknown Hernandez January 08, 2020

Chuckling Softly To My Self. Generally used as a response to a humerous situation or communication via e-mail or instant messaging. Used especially in the office setting where LOL (Laughing out loud) would rarely be the actual or appropriate response.
A co-worker hears another co worker say something innocently funny like "do do" (doo doo) or "to to" (tutu) on the phone with a customer and shoots you a message saying "He just said doo doo." The appropriate response and reply could be "CSTMS"
by Virgil Brazle October 14, 2008

by badboydano September 21, 2011
