From Wiktionary, the free dictionary
Ellipsis of پشمام ریخت! (pašmâm rixt!, literally “my pubes fell out!”)
پشمام • (pašmâm)
- (slang) an interjection of sheer surprise or shock, equivalent to "holy shit!".
- Synonym: (euphemistic) بَرگام! (bargâm, “my leaves!”)
- حاجی پشمام! ― hâji pašmâm! ― Holy shit dude!