one-shotter
/wʌnˈʃɒtə/originally US
noun
1 Golf. A hole of which the green can be reached with a single drive or shot.
2An event which occurs only once or rarely; (also, now chiefly Law ) a person who litigates once or only rarely, as opposed to a company, etc., regularly involved in litigation. Compare repeat player s.v. repeat noun.
Origin
1920s; earliest use found in The Times. From one-shot noun.