Definitions:
grip (something, typically a person's flesh) tightly and sharply between finger and thumb

move one's finger and thumb apart or bring them together on (a touchscreen) in order to zoom into or out of an image, activate a function, etc.

steal or take without permission

live in a frugal way

sail (a boat) so close to the wind that the sails begin to lose power.

an act of pinching someone

a critical point in the game.