Top Definition
Sillster is a noun used to describe someone who acts in a goofy manner, usually with the word silly placed as an adjective before it.

It can also be used in a derogatory way to mock someone for being ignorant.
Girl: Would you like to be my boyfriend, and take me out on dates, and tell me how much you love me?

Boy(laughing): Stop being a silly sillster, and take your shirt off!
by Nilbog_gobliN May 14, 2012

Free Daily Email

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

Emails are sent from We'll never spam you.