Confused, muddled, or in a state of disorganization; also, having talked or chattered foolishly.
Past participle of 'blither,' used as an adjective. British English, particularly Scottish, uses this to describe someone who is flustered, confused, or has been talking nonsense.
The British phrase 'all blithered' is much more common in Scotland and Northern England—it perfectly describes that scattered, can't-get-your-thoughts-straight feeling that Americans might say they're 'all over the place' for!
Complete word intelligence in one call. Free tier — 50 lookups/day.