Often thought to be short for "You Bastard". it actually comes from the Gaelic war cry ‘aigh bas’ which means ‘battle and die’

made popular by the glasgow tongs, a violent gang in Scotland during the 1960s
by monthehoops August 18, 2009
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Scots- "ya bass" is a shortened term of "you bastard" said by many Glaswegians usually in an aggressive tone.
"mon ya bass, i'll fuckin' do you!"
by Bud Mizzleroy September 19, 2005
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'YGT Ya Bass' is the slogan of choice frequently used by the YGT_YoungGillieTeam but often used by others to try and sound hard. The slogan can often be found spray painted in strategic locations in and around the Gilmerton area. The slogan is sometimes used as a term of endearment but also used in the context of trying to put the fear of God into others.

A #GillieRadge tends to overuse the term, especially after a belly-full of drink where they usually mumble it numerous times whilst practicing the #Gillie2Step

Some examples of the appropriate use of the slogan are as follows:
"Are ye going to a pint, aye? Oh good, YGT ya bass!

"Ye can run but ye canny hide coz we're YGT ya bass"

"I'm fae YGT Ya Bass"
by GillieGirl October 6, 2021
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Scottish word used by really cool people to address each other ;)
e.g Sophie and Laura Ya Mad Bass !!
by laura and sophie June 24, 2008
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