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1.
The most gorgeous boy you've ever layed eyes on.
He's usually kind and funny, sensitive and amazing guy ever to walk this world.

Every girl wants to date him and every guy wants to be him.
Yeah hes so kind and funny and amazing, Hes just so tiernan
by suckaaaaaaaaaaaaaaaaaaaaaaaaaa November 16, 2010
 
2.
Irish name
From the Gaelic root name "Tiarna"
Meaning 'Little Lord'
Look! There's Tiernan!!!
by wer6t7ygf April 29, 2009
 
3.
1. from Gaelic meaning king or lord
2. a quiet, awkward, but sort of nice kid.
3. a surname
4. a first name
5. Tommy Tiernan- a sort of funny comedian
Hey there goes Tommy Tiernan, let's hope these jokes are funny
by waltrym April 05, 2013
 
4.
equates to the miniature of diablo.

means 'little tyrant'
in soviet russia, yacos tiernan you!
by smithsmith June 14, 2008