Top definition
To call something both balderdash and bullcrap, hence the name, "baldercrap".
1. My friend told me about scientology, saying that it was a real religion, but I know it's just baldercrap.

2. A guy was yelling about the end of the world, so I called "baldercrap!" and told him to STFU.
by Professor Hubert J Farnsworth November 19, 2009
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