seine and puffering
Da "I fish, therefore I lie" exaggerations dat you sue a "large scale" angler for --- i.e., you haul his fibbin' a** into court regarding his "inflated" estimates of da size and/or number of da scaled seafood specimens dat he supposedly caught in his drag-net --- due to said outrageous reports' allegedly causing you undue distress.
If there were no outside witnesses to what a fisherman's catch actually looked like, then there's no way for you to prove dat he was making anything up --- in a judge's eyes, it's equally plausible dat his verbal statements regarding his super-successful day on da water could actually have been true, and so there would likely be little chance of your "seine and puffering" claim's triumphing in court.