Not Safe For Human Contact !!!! something or someone sooo terribly horrible that they shouldn't be touched or be allowed to touch you because you might die or something like that.
dude 1: Jheeez that dude Cordell is NSFHC
dude 2: Why ?
Dude 1: Cos you might die if you touch him
dude 2: Wow i'm never going near him again
Cordell: Hey guys
(dude 1 and 2 run off)
Cordell: What did I say?