Gallubies
A word you say instead of the real one because you're too lazy to use the right one. It’s like being a kid who doesn’t know the difference between ‘cool’ and ‘gallubies’.
‘I don’t know what that is, but it’s a gallubies.’
‘He said something funny, but I called it a gallubies because I didn’t know the word.’
‘She asked me what happened, and I said, 'It was just a gallubies.'’