Abbreviation of the words "Clothed" and "Sex". Meaning to hump someone without removing clothes. Manytimes done on high school buses as a joke to irritate someone.
"Andrew got so mad last night when we had clex after the track meet"
Pronounced 'Kles', These are some of the best people to argue with. A Clex will maintain an opinion until you are convinced.
They are also passionate and go a great length to help others out. They seek permission to do even mundane things.
A Clex is hard to deal with, hard to loose and hard to contend with. But they are naturals at figuring complex methodologies out. You definitely want a Clex on your side while building something worthwhile.