FWIW, My Uni Hall's rugby song, and a clean one:

We don't play for adoration, we don't play for victory,
We just play for recreation, mighty Cayley Hall are we:
Balls to everyone, balls to everyone,
We won't play you any more...
We won't play you any more.

To the tune of 'Cwm Rhondda'.

On the subject of football songs, who could forget the classic "You're going home in a St. John's ambulance", "Who's the tw*t in the big black hat, Dixon, Dixon", or indeed Swansea City's memorable "Walking down the Mumbles Road" to the tune of Blaydon Races?