I have never heard it used outside of today on this meme as a descriptor for some kind of behaviour. It's making me think of Popeye and grizzled old fishermen and Bovril.
I think it has the added connotation of being angry or upset because you didn't get your way, so it has a lot to do with being offended at something. Like, people get called salty a lot when they ship something but a different ship becomes canon or is more popular.
I'm not American, so a lot of slang I see on the Internet goes right over my head. Urban Dictionary is really useful for keeping track (a lot of the definitions are NSFW though, just to let you know)
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WTF IS SALTY???
(Anonymous) 2016-02-29 06:23 am (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 06:27 am (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 06:49 am (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 07:01 am (UTC)(link)I think it was originally Chicago slang that migrated outwards semi-recently.
Re: WTF IS SALTY???
(Anonymous) 2016-02-29 07:15 am (UTC)(link)I've only ever heard it used to mean 'foul-mouthed' by my grandparents, and they're from Idaho.
Re: WTF IS SALTY???
(Anonymous) 2016-02-29 07:50 pm (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 05:06 pm (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 07:28 am (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 07:32 am (UTC)(link)Re: WTF IS SALTY???
(Anonymous) 2016-02-29 04:08 pm (UTC)(link)I'm not American, so a lot of slang I see on the Internet goes right over my head. Urban Dictionary is really useful for keeping track (a lot of the definitions are NSFW though, just to let you know)
Re: WTF IS SALTY???
(Anonymous) 2016-02-29 08:46 pm (UTC)(link)