Since the rest of the definitions are outdated and from a couple of years ago I will explain what a dab is. A dab is a dance move. Typically used by 10 to 21 year olds, the "dab" is a dance move where the dancer drops his head into the crevice, which happens to be their inner elbow, while simultaneously raising the arm that they have dropped their head onto, and raising the other arm in the other direction. A simple google search will help.
by Spam Blocker 2000 April 11, 2016
by Urban person for LOL March 09, 2017
by Bojazle February 23, 2016
by _Hannah_😑💖 May 13, 2016
when you apply your nose directly into the inside of your ellobow with the other hand extended out in a diagonal position.
by ProffesorAfrica February 20, 2016
A way to sneeze by sneezing the regular way but sticking your other arm in a angle like a slash ( / )
by Pandapopprincess February 15, 2017
by Queen_kay1001 February 25, 2016