The band are currently working on the follow-up to their 2011 debut What Did You Expect From The Vaccines? and have written a song about being sulky.
"There's a track called 'Bad Mood' about me being moody," frontman Justin Young told the Daily Star.
"I started with the lyric: 'I was at the bus stop combing my hair' and thought it was the s**ttest lyric ever.
"Then I played it to our producer Ethan Johns and he thought it was fun and weird, like a lyric Paul McCartney would write, so I stuck with it."
The Vaccines recently insisted that they won't sing about touring on the second album as it will be "boring" for fans.
> The Vaccines confirm May 2012 tour dates
Watch the music video for The Vaccines' new single 'Tiger Blood' below: