Oxford Advanced Lerarner's Dictionaryの定義は次のようになっている: (informal) to have the qualities and abilities needed for sth:He’s not cut out for teaching. Ç He’s not cut out to be a teacher.
Answers.com: cut out for. Suited or fitted by nature, as in Dean's not cut out for lexicography.
The Free Dictionary: (tr; usually passive) to suit or equip for you're not cut out for this job
cut out to〜の形もある: MacMillan Dictionary: not be cut out for something/to do something to lack the right qualities or character for doing something Bill was never cut out to be a parent.