Muse-athon 

A period lasting at least an hour of listening to awesome music by the most fantastic band ever made (MUSE) whilst reading and looking at anything associated with them.

Guy: 'Duuude why were you liking so many MUSE groups on facebook? And continually saying how underrated 'Sing for Absolution' was?'
Girl: 'Sorry man, I went on a bit of a Muse-athon - but hey, at least it's not some sucky twelve year old girl' (see Justin Bieber)

Muse-athon by Bassjungle August 21, 2010

Mustathon 

A routine conversation with a parent when they suddenly switch to offering unsolicited advice full of musts, shoulds, mustn'ts and shouldn'ts.

Me: Nice weather!

Mum: You should do some work on the house. You must exercise.

Me: (thinks) Shit. This is turning into a mustathon!

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Dad: You should get a better job, get a nice girlfriend, learn how to drive.

Me: Oh no! I've been mustathoned!

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Me: Was out with the dogs earlier when I bumped into mum. We talked about the dogs a bit then she hit me with a mustathon.

Mustathon by The WeirdnessSymposium May 2, 2009