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1.
(noun) an undereducated obnoxious male or female individual, prone to engaging in purposeful and/or stupid behavior.
"Hey, she's just a bosomhead; she'll agree with anything the boss decides!"

"We can tell he's a bosomhead by that HUGE wiggling point on top of his head and his accompanying subserviant behavior!"
by Clobberuski June 25, 2009
 
2.
a naive, often difficult to get along with person
Hey, she sure is acting like a real bosomhead today!
John! You silly bosomhead, stop making those funny noises!
by Clobberuski June 24, 2009