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1.
Two-A-Days, or sometimes known as Hell Week, is a term in football to describe when a football team has practice twice a day: in the morning, and in the afternoon or evening. Two-A-Days are usually done the beginning of fall, such as the end of July or mid-August, but are sometimes done on a daily basis for some teams.
Two-a-days,,,,practice from 230pm until 8pm
by 5 J's August 17, 2007
 
2.
an extreme week of hell which football tryouts are held, where there are 2 practices a day
hey bro you ready for two a days ?
by mark andrews August 15, 2007
 
3.
The type of haircut sported by many players in the MTV show "Two a Days". Also very popular among southern males in general. To get a Two a days, one has to grow out their hair out front and flip it to the side while the sides and back are cut shorter.
Alex, on the Hoover High Bucs, has the Two a days. No, that doesn't refer to his football practice, it refers to his haircut.

Michael Clifton has that two-a-days.
by Hoover High February 12, 2010
 
4.
The act of switching underwear after the first pair of underwear has been too encumbered with "duckbutter" or "swampass" or "bat-wings".
"Dude before we go out I got to go home."

"Why man?"

"Its summer........"

"So?"

"It's twoadays"

"Okay, gotcha"
by anhatt2 March 20, 2012
 
5.
When you have sex with two different people in the same 24 hour period, preferably one in the morning and one at night. Threesomes don't count.
I had the best two-a-day yesterday; I did Jenn at 2:00pm and Brittany at 2:00am.
by tylerton99 May 21, 2010
 
6.
it is when a man squats over a women with his ass in her face. then proceeds to titty fuck her while crapping in her mouth, and placing one fist in her ass and one in her vagina.
after practice coach proceeded to teach the cheerleaders the real meaning of two-a-days.
by adam,james,drayton February 06, 2007