Adjective meaning fantastic or fantabulous. Has the word 'rhubarb' in it purely because it's a great word, and a tasty fruit.

Could typically be used by posh people instead of the usual 'spiffing'.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)