Examples from the Web for tip-up
The Smith & Wesson pistol has a tip-up action and an automatic extractor.Pistol and Revolver Shooting|A. L. A. Himmelwright
After such glorious success the boys would have to crown him as the king of tip-up fishermen.Phil Bradley's Snow-shoe Trail|Silas K. Boone
With eager eyes we watched the line play out, or saw the tip-up give the warning sign.Pastoral Days|William Hamilton Gibson
This contrivance is called a 'tip-up,' from the movement which is certain to follow the seizure of the bait.
He is a curious little chap, the Solitary Snipe, and we used to call him Tip-up.