in one’s, phr. — Green’s Dictionary of Slang

in one’s phr.

[phr. in one’s life]

(US) part of one’s circumstances, e.g. none of that in mine, no thank you.

1916

DN IV 324: In mine (his, yours, etc.) [...] As my (his, etc.) part, share, portion, due, etc. ‘If I marry I don’t want any divorce in mine.’ ‘Her folks wanted her to teach school, but she didn’t want any teaching in hers.’.