The Valley Girls really had a large influence on the slang of the 80's, so much so, that their slang became known as "Valspeak". "Qualifiers such as “Like”, “Whatever”, “way”, "as if!", “totally” and “duh” were interjected in the middle of phrases and sentences as emphasizers" (Wikipedia) Take a look!
Something extremely good
Don't Have a Cow!
Meaning don't freak out
(same meaning today it just got started then!)
Like, Gag me with a spoon!