Verb:To Ninja or to be Ninjad. meaning to give it to someone real good. Go all the way and then some. No half assing..giving it 200%. Usually referenced for acts of a sexual nature or revenge.
Dave was so ninjad by his lover he couldnt walk for three days. "Totally worth it" he said, "I cant wait to be ninjad again"!
Maggie said "I am going to Ninja Mike so bad he wont know what hit him"