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1.
The sense of aroggance and style shown when attempting a social climbing feat
"See him? he thinks he's pure gallus"
by m0r1arty May 27, 2005
86 19
 
2.
used to describe a person who is extremely galling.

If you see this person, do not think twice about smacking them across the face....or they will spread their gallu-ness and infect the world
OMG, that gallu saw us. DO NOT talk to it.
by john preston horner June 21, 2010
0 3
 
3.
Buzzing, sounding good, a good time, shit hot
Man, your pipes are gallus.

That was a gallus night out.
by Gallusman July 26, 2010
5 9