kingpin

Pronunciation:			'king`pin
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WordNet Dictionary
	Definition:		[n]  the front bowling pin in the triangular arrangement of ten pins [n]  bolt that provides a steering joint in a motor vehicle [n]  the most important person in a group or undertaking
	Synonyms:		bigwig, headpin, kingbolt, swivel pin, top banana
	See Also:		bolt, bowling pin, important person, influential person, personage, pin