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1.
shortened down version of Go On
Gaan ya good thing
by Mark Hubbard April 02, 2003
 
2.
Dutch verb meaning 'going'
Laten we naar buiten gaan

Let's go outside
by Bobsema March 17, 2004
 
3.
A way the word 'going' is said in West Cumbria.
'EEE, aas ga'an yam, marra.
by AnnieOfCumbria February 01, 2009
 
4.
Old Monkey from new zeland that has a brown nose and that looks pretty old. Likes to annoy humans.
Oh look it's a Gaan... don't let it come close or it'll flame us.
by Someone from EQEmu June 02, 2004