look up any word, like dirty sanchez:
 
2.
to go balls deep, or to give it your all. to try really hard and give a situation 100% of your attention
"man, pedro really goes all-out"
by vizcacha July 01, 2006
 
1.
Giving as much effort as possible; not holding back.

'All' refers to everything, and 'out' is an intensifier. So 'all-out' means 'everything and more'.
1) Karen went all-out in the race, and won a gold medal.

2) Captain Barne's final act was to order an all-out assault on the fortress.
by VAKI5 May 10, 2005
 
3.
not hold anything back, sparing nothing
Both sides went all-out when the game started.
by Light Joker December 06, 2005
 
4.
An "Electro Pop" group from Boston, Massachusetts. Known mostly for their single, "Lights".

The group released their first single "Timebomb" in 2008, it didn't get much success. But they kept trying anyway, they then released their first album, "The Get Down", followed by their single, "Lights". Summer of 2010, They released their free mixtape, "All Out Everything" Which has had more success than The Get Down did, but it still hasn't made it big.

The duo is reported to be releasing album #3 in the summer of 2011.

All Out consists of Matt McCormick and Joe Skutnik.
Person one: "I'm looking for new music, any ideas? I listen to 2 AM Club and 3oh!3"

Person 2: "You should check out All Out, they have free music available, and their style is similar to the groups you like."

PUT YOUR A.O's UP!!!
by Paige Loves AO May 26, 2011