a very old irish oath with several spellings, a bastardization of "christ", i think. my grandmother says this a lot.
"crimminy, ralph, the phone is ringing! pick up the phone! no, i don't know where it is. well, where did you leave it? crimminy, why did you leave it out there? no, never mind, it's stopped ringing. dammit, it was probably betty. frank's probably died and we'll have to wait 'till tomorrow to find out about it, now won't we? oh, stop crying, ralph! crimminy!"