Top Definition
An abbreviation for "shut your dirty little mouth."
Everytime I talk to Joanna, I need to tell her "SYDLM" because she never shuts up.
by branchness April 11, 2007
5 Words related to sydlm

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×