Jacob's Law 

This is a fundamental law of manhood. Jacob's Law is that when referring to ones penis in a jokingly or flirtatious manner, you must portray it as smaller than it actually is. This means you never let a girl down once in the sack.

Originating from the Australian outback at Jacob's Creek hence the name

Matthew: I was chatting to this girl last night and ended up having sex
Ben: ah nice, did you use Jacob's Law?
Matthew: yeah for once a girl was fine with my average sized penis

Jacob's Law by ciy June 14, 2020

Jacob's Law 

During a board game, a player, who has played the game more than once, cannot change their decision for a more advantageous one, once they have finished their turn. A turn that is over, is over!!!

Player 1's turn ends... During player 2's turn, player 1 says... " NO WAIT... I did not mean to do that." Player two says, "Jacob's Law"

Jacob's Law by mmaerzluft February 1, 2022

Jacob's Law 

The scientific law maintaining that you can only do something not stupid for so long. Inferring that no matter how well things are going, something stupid is bound to happen.

Perry: "Jacob is doing really well so far..."

Nick: "Don't worry, he'll mess things up, it's Jacob's law."

Jacob's Law by LazySour February 3, 2008

Jacob's Third Law 

Men are always right, Women are always wrong.

Exeption: When (most) men agree with the woman, in which case the woman is right.
Otherwise a paradox would be created in which neither man or woman are right.

Felice says Thomas is yellow, Thomas says he's not. Male friends agree with Felice


According to Jacob's Third Law Felice and her male friends are right. Thomas is yellow.

Jacob's Third Law by Elizabeth171 April 11, 2009

Jacob's Third Law 

Men are always right, women are always wrong.

Felice says Thomas is yellow, Thomas says he's not.

According to Jacob's Third Law (by Jacob, who was also a man) Thomas is right, he is not yellow

Jacob's Third Law by William717 April 8, 2009