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1.
A very restless man in bed that never wants to quit.
That Jacobson was unbelievable last night!
by redsharpie34295 December 13, 2010
 
2.
1) A guy who professes to not be into a certain type of girl such as blondes or tall girls, yet will purposely ask out and date outside of his type when a friend mentions someone he'd like to ask out.

2) An insecure person with no thought or consideration for the feelings of others.
Cliff was surprised to find out that Aaron Jacobsoned him by going out with a refined girl like Susan especially when Aaron always seemed to prefer trashy women with no morals.
by Sharpie22 March 02, 2009