This adjective is created by merging the words 'random' and 'saga'.
It is used occasionally to predefine a tale and incite interest as usually first you will have to explain the term to your audience. Commonly it means a series of events that undeniably meet the criteria for random, haphazard hilarity.
1. Hey, gey this guys, was such a randomsaga. Jez and I... sorry? What's a...? Oh, well a randomsaga is...
2. Jeremy and I were in town and an old lady lost control of her zimmer frame and we jumped on as it rolled down the hill and went on glorious adventures to Sweden with a talking apple, etc.