A shpeath is someone who is the opposite of what most people consider a friend. Just a general trashy human being to put it short. Character traits include, really sensitive to jokes or anything, saying sexual comments about siblings, no feelings, constantly lying, and being a bit of a sociopath.
"Shpeath is a dick head", Said Jim.
"Yeah, I totally agree.", replied Bob.
Not having an erection after watching "Shrek is Love, Shrek is Life" or really any media that includes Shrek.
Friend One: "So did you watch Shrek is Love, Shrek is Life?"
Friend Two: "Yeah that shit was disgusting"
Friend One: "C'mon bro, why you gotta have Shrektile Dysfunction on me"