A classic gag, tossing a pie into another person's face. Usually, this is a cream pie to get the proper Covered in Gunge effect. For extra comedy value, the victim might take a taste of the pie and note it's not bad.
This Practical Joke was a staple of silent movie comedies, which came up with most of the variants. Often, a missed throw would result in an Escalating War pie fight. The all-out pie [...] [tvtropes.org]