Lyric discussion by bauble 

I'll try to organize some thoughts here (mis-guided though they may be):

Mariott is/was Mormon (as was Zevon's mother), a religion that requires a 10% tithe from it's members.
'Mazuma' is a Yiddish word meaning 'money.' I think the implication is that Jesus was there to collect Mariott's tithe, perhaps because Mariott had died, though I'm not sure that Mariott's status is important at all.

The Battle of San Jacinto was the decisive battle in the Texas Revolution; I think this might refer to Zevon's revolt from Mormonism, and possibly from organized religion, as, in the last verse, he's no longer at the Mariott, he's moved to a more secular hotel, the Weston, and is gambling; and he avoids Heston, whom I agree is a representation of religion here.

@bauble Nonsense. None of this is accurate.

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