"Baggy Trousers" is a song by English ska/pop band Madness from their 1980 album Absolutely.
It was written by lead singer Graham "Suggs" McPherson and guitarist Chris Foreman and reminisces about school days.
Mike Barson also received a writing credit in error, the correct McPherson/Foreman credit being used for subsequent releases.
The band first began performing the song at live shows in April 1980.