To throw one's hat in (as "in the ring") is to:
1) to challenge or contend for something.
2) nominate someone or oneself for something. To volunteer.
A boxing metaphor that originated in the early 19th century when one who wished to challenge a boxer would throw his hat into the ring as a way of having your challenge noticed in a crowded ring.
In 1912 Theodore Roosevelt, who was an advid boxer, was the first presidential candidate to use "throw my hat in the ring" to announce his run at the U.S. presidency.
When you throw your hat over the wall, you're committing to doing something. The phrase is derived from what you would do before you climb over a wall - you throw the hat over to the other side, so it doesn't fall off while you are climbing.
"throw your hat over the wall" example:
JFK himself. When he was in office, he stood before the world and promised them a man on the moon within 10 years. Thing is, nobody had started working on a space program at that point. JFK had no data to back up his claims, no insight into the practicality of space travel. But you know what he had?
The man had sac. The man had the sac to stand before the world and say “Yo, yo get this! We’re going to the moon.”
To trap oneself into producing a result or achieving something monumental by making the consequences of not doing so painful, as in throwing one's hat over a wall that appears too high to climb so that one must find a way to the other side else live hatless.
"If you really want to move to that town, quit waiting for perfect circumstances; throw your hat over the wall and put in your 30-days' notice on your apartment so you'll HAVE to find a place down there."
throw my hat over the wall, to commit to doing something,
to say you will do something and then do it without hesitation.
JFK said we will go to the moon in 10 years, even though no one had started the space programe at that time but he had the stones to throw his hat over the wall.
An above average hat that is worn to parties that makes the night so much better; exclusions to the rule include but are not limited to 59/50 hats, hats worn sideways, and any other hat that would tempt somebody to call you a douche or tool.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.