Top definition
The brown marks left, below waterline, on the white porcelain after a particularly messy dump.

(Sometimes only removable with brush and boiling water).
OK. C'mon, own up. Who's tank-tracked the bog?

Sorry guys. That curry got the better of me. I've tank-tracked the toilet.

There are tank tracks in the toilet. Who is responsible?
by Piemanius May 20, 2008
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