vela de ignição
1. A device in an internal combustion engine that produces an electric spark to ignite the fuel mixture
The mechanic replaced the old spark plugs with new ones.
O mecânico substituiu as velas de ignição antigas por novas.
2. A person or thing that triggers or energizes something; a catalyst
She was the spark plug of the team, always motivating everyone.
Ela era a vela de ignição do time, sempre motivando todos.
In Brazilian automotive culture, 'vela de ignição' is a standard technical term familiar to car owners and mechanics. The figurative use referring to an energetic person is also common in Portuguese-speaking business and sports contexts. In the USA, 'spark plug' frequently appears in motivational and team sports contexts to describe an energizing team member.
NYC Slang
spark plug can refer to an energetic, motivating person in NYC slang, though not specifically regional to New York
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