Gordo

[dylandylan]

I know this means fat, but what's the underlying cultural significance here? Would a woman use this as a term of affection for a male friend or is it reserved exclusively for a boyfriend or romantic partner?

[AngelicaDeAlquezar]

It depends on the region and the woman, but it's not necessarily used for a romantic partner.

[Adryan17]

Yes, in Spain you only can use it to refer to your partner.
otherwise it sounds weird. "gordo" is like "cariño", "nene", "amor"
so, don't call that to your friends!

[ROBINDESBOIS]

It depends on the region. Never in Castille. I thought it was more of a southamerican use.