A day's worth of vaginal perspiration which has the scent of a Japanese trawler deck in summer.
" Hey Rachael, you better have a shower. I can smell your Tuna Sweat".
by SomeTosser September 16, 2014
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Sweat tuna can be used to replace such phrases like

No worries
No problem
Yea for sure
Nat and mot were out bush and Nat asked mot
What he thought of the serenity
Mot replies " it's bloody sweat tuna "
by Dave the drover August 29, 2019
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