(UK Und.) a talkative person; esp. in police use, a minor informer; also attrib.
|Signs of Crime 175: Budgie A talkative man, especially of small stature, also used as a nickname; can be used by police to refer to a minor informer – one who has details of only ‘gas meter jobs’ (unimportant local cases).|
|(con. 1990s) A Few Kind Words and a Loaded Gun 416: The Cardiff boys were mainly big, dopey bodybuilders with budgie syndrome who strutted about playing at being gangsters.|
|Truth 65: ‘Our friend Ivan is mentioned. That’s last week, six days ago.’ ‘Mentioned how?’ ‘One budgie says Ivan’s got something to sell.|