girls are not allowed to have any sort of interaction with a penis for the full month of december
boy: suck my weiner, wanna diddle around?, lets dry sex!
girl: i cant its decline dick december.
For people who failed NNN or people who want to challenge themselves further after winning NNN
Weak Mortal: “bro I just failed No Nut November”
God: “nah bro you can still do Decline Dick December”
When somebody starts out performing a task really well, but as they continue they slowly start to do worse. Eventually they are just garbage at the task and everyone around them is mad at them.
I thought he would win by a mile, but then the Shawn decline kicked in.