what u say when ur dick is in a shitload of pain. (i.e. getting kicked in the balls)
gf:your such an asshole! *kicks dude in nuts*
bf: *groaning and falling to the ground* painis!
Another word for penis, popularized by the TF2 community. Derived from the Soldier's voice line: ''Pain is weakness leaving the body,'' >>> ''PAINIS weakness leaving the body.''
A character based on the Team Fortress 2 Soldier that was originally meant to be a response to a sub-fad by Youtube user of Rubberfruit.
"I am Painis Cupcake... I will eat you..."
-Painis Cupcake