When one freaks out on somoene too early. Usually about something stupid. Most of the time they don't have all the facts and jump to conclusions, assuming the worst.
"Wow. He freaked on you. For nothing."
" Yea, that's some premature freakulation"
Similar to Opps/Oppositions. it is a person who is out to get you and will notstop and devotes a large amount of their time to take you down/ mess with you.