2 - When somebody puts a bunch of Jonas Brother quotes or posters or other such JB things on something or someone
It's pretty much when the Jonas brothers "Pone" (not Pwn) someone/thing either directly or through their fans.
Girl 2 - "Yah she's totally been Jonafied"
Example 2 - Girl 1 - "Did you see the third stall from the door in the girls washroom on the second floor?"
Girl 2 - "YES! Stacey was in there yesterday and she totally Jonafied the walls! The janitors were all like 'Yo that's illogical, I can't have it'"