Senny-isms
Stupid Wall - tired to the point of sillyness or being in a similar state. Usually accompanied by giggle-fits.
Derp - to act stupid or foolish or make a stupid mistake.
FAQ
What does 'Sennyotai' mean? (short)

Literally means 'fairy team/group'. I created a group of fairy characters a long time ago and have been using them as a character basis in MMOs, RPGs, and basically anywhere I can. ;D