A new, hip, cool, dank dance trend on social media. The Running Man Challenge is when you are doing the "Running Man" to an old 90's song, "Ghost Town DJs - My Boo".
I wanna try that Running Man Challenge thing everyone's been doing.
by Alover Qin May 5, 2016
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A Milk-man challenge is when a group of guys lay in a circle and perform oral sex on each other. The winner is the first man to ejaculate, meaning he is the only one who does not end up with semen in his mouth. The rest of the group must carry on until there is only one left. He is declared the Milk-man.
The owner of the new car will be declared with a Milk-man challenge!
by TigerBeard March 10, 2015
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The challenge of masturbating to any 5 Lady Gaga music videos within a 24 hour period.

Restrictions are: You can only watch 1 music video at a time. The videos must be on your history. The participant CANNOT be drunk.
Oh my God, I was so bored over the weekend I tried to finish the Lady Gaga Iron Man Challenge.
by ydyke June 20, 2010
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