Green’s Dictionary of Slang

someone who collapses from fatigue, or an excess of alcohol of drugs.

1966		H.S. Thompson Hell’s Angels (1967) 205: Mouldy Marvin is widely admired for his work on crashers. He once wired Terry the Tramp to an electrical outlet, then soaked his Levis with beer and plugged him in.
1984		Eble Campus Sl. Mar.
1996		Eble Sl. and Sociability 33: Some of the slang items built by the addition of -er are [...] crasher ‘one who cannot tolerate alcohol’.