When you take a shot of alcohol and as soon as you swallow it comes right back up.
Awe man Maddy took 5 shots then had a down and up!
by POKEMON123 July 3, 2013
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1: I just gave that person the up-down

2: whats the up down

3: I checked her/him out from head to toe
by otis101 May 23, 2012
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The standard unit of measure for blowjobs, push-ups, sit-ups, and other events of a cyclical nature. The unit symbol for up-down is "ud".
Alec only lasted 2 up-downs.

Alex, you owe me 12 up-downs because I won that bet.

Bro, how many up-downs did she give you?
by G.T. IV April 24, 2010
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Used in many sports for conditioning, or punishment. Drill started by saying "get em going", and that is the cue to start chopping your feet. When you hear "hit it" drop to the floor on your chest and get up as fast as you can and continue chopping your feet. Very pain full
Up Downs are...

Football: Stop holding your dicks and make a tackle. GET EM GOING HIT IT!
by alexangelidis December 10, 2008
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A disease infecting the human body. The diseased person does not fully realize they have it. Symptoms may include staring off into space, not being able to close your mouth, inability to step touch, and not having responses to individuals
“Yo that urchin is looking real wack”
“Yeah it looks like a serious case of the up downs
by Mister Papi July 28, 2018
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An extremely fun and short-lived game we used to play in primary school.
RULES:
1. 2-4 kids are picked from a crowd of, say, schoolkids, in a classroom, who then goto the front of the room.
2. The rest of the kids in the room place their heads on the table so they can't see, but put their thumbs pointing upwards.
3. The kids at the front then proceed around the room and pick out one individual of the people with their thumbs up, and brush their thumbs. (One person not playing the game, usually the teacher, moniters the progress of the walkers and should take a mental note of who was picked.) The person whos thumbs have been brushed pull their thumbs itno their fists so they cant be chosen again. When the walkers have each done this to one person each, they return to the front of the room.
4. The kids sit back up and the ones who had their thumbs brushed stand up (if the number of people standing up exceeds the number of walkers then the game must be restarted, coz somebody's not playing fair) and then have one guess each at who did the thumb brushing. if they guess corectly they become a walker and the walker sits back down, and the whole game starts up again. Pretty cool huh?

TIP ON HOW TO WIN:
1. make a tiny hole out the sit of your arm to try and see through
2. try to set yourself up in a position in which you can see the floor and therefore the shoes of the person who brushes your thumb. compare shoes when guessing.
3. try to make a note of the gentleness or verocity in which your thumb was brushed. If it was a gentle brush and there are two people to choose from, the guy that steals your lunch money and a girl who wouldnt touch a brick for fear of hurting it, then a good guess would assume the girl was, perhaps, the one that brushed you. Be aware that even 7 year old baby bullies can be very sneaky.
4. when your thumb is brushed quickly whip up your head for a look and back down again, and hope no-one sees.
teacher: ok children, theres 3 minutes left of school before the bell. Lets have a quick game of heads down thumbs up!!
children: (cheering, like at a footy match when the home team is up 56 points 20 minutes from the end of the game)
by AndyD July 25, 2006
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