adjective

obtained or achieved more by chance than skill.

a fluky goal

lucky,fortunate,providential,timely,opportune,serendipitous,expedient,heaven-sent,auspicious,propitious,felicitous,convenient,apt,chance,fortuitous,accidental,unexpected,unanticipated,unforeseen,unlooked-for,coincidental,haphazard,inadvertent,random,unintended,jammy