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Tillian is the shipped name of two lovers named Tyler and Gillian. They both love each other, but don't know it. All of their friends know so they tease them about it. Everyone tries to convince them to date but they don't. Their love will be forever because it's so strong.
Aw Tillian is so cute, they should date already!
Tillian by Tillian Lovers May 4, 2014
Tricia McMillan. Popular female character in the Hitchhiker's guide series. Mother to Arthur Dent's child, Random.
Trillian is on hot and froody chick.
trillian by Jonathan July 21, 2008
An instant messaging program that allows you to chat to people using ICQ, AIM, Yahoo Messenger, IRC, and MSN Messenger simultaneously. It is considered to be the United Nations of chatting.
I am talking to my cousin on MSN Messenger and my other cousin on IRC at the same time with Trillian.
Trillian by Pejhman January 26, 2005
Twillin means to spin or rotate something very fast.
Damon: Man did you see that guy?!?
Mark: Yeah he was really twillin his meat around in her face.
Twillin by Gen Snafu October 16, 2010
charicter in the book a hitchhikers guide to the universe for which the messaging service is named for
trillian by adam May 13, 2005
A kick ass Instant Messaging program. Combines ICQ, AIM, YAHOO, IRC, and MSN. See www.trillian.cc
trillian by IdleChill September 1, 2003