Make something lame. People always use the word dad for boring things. For example, dad jokes. If you dadify something, it means you made it boring or lame.
Dude, you totally dadified that cup!
We are going to dadify you if you don't stop!
Term used to describe absolutely destroying someone/making them hold that phat ass L/GgEzNoRe'ing someone. There is no counter attack for this because the word has an automatic no no u rule and no reverse card.
You: *Destroying some kid*
Kid: OMFG YOU'RE TRASH
You: Hey Ron go devdify that ugly ass kid.