RhymeZone: wibble definitions

Definitions of wibble:

noun: (Britain, slang) Meaningless or content-free chatter in a discussion; drivel, babble.
noun: (Britain, computing) Used as the name of a metasyntactic variable.
verb: (Britain, Internet slang) To make meaningless comments.
verb: (US, informal) To be overwhelmed by emotion and take on a childish expression with a quivering lips and chin.

(Definitions from Wiktionary)