Besides pregnancy as the worst STD, gonnasypherpelaids is the grand daddy combining gonorrhea, syphilis, herpes, and AIDs
gonnasypherpelaids = gonorrhea + syphilis + herpes + AIDs
Also, a hit-single by the infamous band Pig Mutilator (my former band)
Dude, that chick is nasty as shit. She's probably got gonnasypherpelaids.
Sebastian: Damn! I hooked up with that whore down the hall who got tag-teamed last week.
Julio: Yo man go get yourself checked for gonnasypherpelaids!