A snafu is a situation where everything is confused or mixed up.
The word snafu is usually used to talk about a problem in a funny way.
Examples:
The party was a snafu because no one knew where to go.
The snafu at the airport made everyone late.
We had a big snafu at the restaurant last night.
The snafu with the presents was funny.
The whole day was a snafu from start to finish.
The snafu with the cake was the funniest part of the party.