1 definition by JEP07

Top Definition
...a fundraising or membership drive performed exclusively via email, cellphones and weblogs on the worldwide web.
We are planning a webslam for our Facebook group to increase it's membership.
by JEP07 February 16, 2010
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.