A phrase combining the common term 'moderately', meaning somewhat and 'dec' an abbreviation of the word decent. The phrase itself means something that is between "decent" and "somewhat decent." Can be expressed by simply saying 'dec-dec.'
Hey man, that class is dec to moderately dec.
That girl over there is moderately dec.
I am dec to dec-dec at basketball.
National give your Gf YOUR BIGGEST hoodie or hold her hand and if you don’t do either you HAVE TO KISS HER
Me- hey do you know what today is?
Bf- no why?
Me- it’s Dec 10!
Set your lockscreen as your favorite picture of your gf, NEVER CHANGE IT!
Guy 1: hey have you changed your wallpaper yet? It’s dec 2
Guy 2: yes I did, it’s my gf now