As far as I know you can use either when referring to the "levee" usage, but for the lesbian slang you need dyke. Where ambiguity exists, infer from context. I

As far as I know you can use either when referring to the "levee" usage, but for the lesbian slang you need dyke. Where ambiguity exists, infer from context. I think the slang term "dyke" is a bit out of date anyway?