Top Definition
A guy stands up and does anal on a girl but grabs her feet and goes up and down like a jackhammer.
He gave me an unexpected Boston Jackhammer last night. He was going so fast, I loved it.
by iforget April 19, 2005
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.