adjective Informal. 1.
being a person who can be turned to for expert knowledge, advice, or reliable performance, especially in a crucial situation: He's our go-to guy in a budget crisis.
noting something that can always be relied on to bring satisfaction, success, or good results: my go-to recipe for cheesecake.
(in team sports) being a player who can be relied on to score, especially at a crucial time in the game.