Dinny fink sae (or 'I don't think so') to disagree or indicate that a person may be 'Talking bollocks for Scotland'. Example: An example of its use: Macaulay: Yeah, I pulled this really good looking burd at the weekend Jonny: Dinny fink sae.
D.F.S. (DINNY FINK SAE)
Meaning of D.F.S. (DINNY FINK SAE) in English
Slang English vocab. Английский сленговый словарь. 2012