South Florida, in an old neighborhood

Looks almost like a very large Crown of Thorns, but I doubt it. Hard to see if there are any thorns or not, but I've never seen them get a barrel trunk like that. If it is related, it's some euphorbia, which can have a milky sap that can be toxic and irritating. They're common enough though, just don't let pets chew them. That said, I would wait for a more decisive identification

Automatic identification via PlantNet summary

Most likely match: Pachypodium rutenbergianum Vatke

Common name	Scientific name	Likeliness
Madagascar palm	Pachypodium rutenbergianum	39.45 %
Madagascar Palm	Pachypodium geayi	32.01 %
Madagascar Palm	Pachypodium lamerei	12.35 %
Bottle tree	Pachypodium lealii	0.90 %
/	Pachypodium decaryi	0.61 %

Beep, boop

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!lemmySilver