A gravity knife refers to a type of folding knife that opens with the assistance of gravity. When tilted or flipped, the blade moves outwards due to the force of gravity, making it easier to open the knife quickly. Full definition
Related: Useless New York Republican idiots are blocking a Democrat sponsored bill to end the criminalization of gravity knives in New York. (reason.com)
Cuomo received his first batch of bills — 42 in all — in roughly a month today, including a measure that would decriminalize certain types of knives that often are used as work tools while keeping in place a ban on gravity knives and switchblades. (nystateofpolitics.com)
A bill that would ban gravity knives has once again been vetoed by Gov. Andrew Cuomo, who cited overly broad language in the legislation that would have applied to too many knives. (nystateofpolitics.com)