Siff the South African slang word for something that is disgusting and disliked. Siff water gherkin is the disgusting water that the last gherkin sits in. The water is murky and the gherkin is wrinkled and wasting away. The word implies that someone is past the point of help and should be thrown out
Ashley stop being a siff water gherkin, you're better than that.
The art of being so pathetic and useless that cease to be useful in society. A potato peeler with a limp wrist cannot perform their assigned job thus being useless.
Anthea stop doing that, you look like a limp-wristed potato peeler.