Not bad whipped cream fight from a 1986 movie "Beginner's Luck" http://www.imdb.com/title/tt0090708/ -- five girls and five guys get hit. I'm guessing the actress in the GIF below is named Kate Talbot(?) though it looks like few of the actors went on to do anything else. New to me and hope it is to you as well (cued to 3:51):

https://www.youtube.com/watch?v=BIlpXhcH21w

Sorry for this in-thread repost. Just seeing if the Video Archive will accept my YouTube link. Same video as above, just not cueing it up to 3:51. repost--> https://www.youtube.com/watch?v=BIlpXhcH21w
Carry on

I'll be darned, that did it. Just pasted the link. Sadly the link's not click-able now. Hope to understand this someday.