That's a completely effortless translation. I am pretty sure that "мне по хрену" is a parody on "мне по плечу" (literally "fits my shoulder" but means "doable

That's a completely effortless translation. I am pretty sure that "мне по хрену" is a parody on "мне по плечу" (literally "fits my shoulder" but means "doable to me / within my powers"). Russian people coin new expressions with such witticisms all the time. So, reproducing the same parody in English, one could say "fits my wiener". Horseradish here being an obscenity-avoiding euphemism for c*ck (like English "wiener"), not the plant (just like all the sausages and cucumbers in the other languages).