A word that can be used in any way whatsoever. Pretending to be mad, as an enthusiastic adjective, a greeting, the choice is yours...
"Keep on wibblin', dude!"
"He's just talking a load of wibble. Hush fool."
"Wibble wibble wibble".
"That film was wibblin' marvellous!"
"He came, he saw, he wibbled."