"oil pan" means: The North American term for what British and Australian drivers call a sump — the reservoir at the bottom of an engine that holds the motor.... It carries a violent or aggressive reference, so it is worth noting the context. In most cases the word is used jokingly or for emphasis rather than as a sign of real intent. A calm question about where it was heard is usually all that is needed; pay more attention to behaviour and tone than to the word itself.