Conquest Chronicles ask, we answer.

"The Rakes of Mallow" is the name of an old Irish drinking song that Notre Dame fans will recognize as the jig.  You can hear it here or find the sheet music here, but the lyrics are as follows:

Beauing, belleing, dancing, drinking,
Breaking windows, cursing, sinking
Ever raking, never thinking,
Live the Rakes of Mallow;
Spending faster than it comes,
Beating waiters bailiffs, duns,
Bacchus' true begotten sons,
Live the Rakes of Mallow.

One time naught but claret drinking,
Then like politicians, thinking
To raise the "sinking funds"when sinking.
Live the Rakes of Mallow.
When at home, with da-da dying,
Still for mellow water crying;
But, where there's good claret plying
Live the Rakes of Mallow.

Racking tenants, stewards teasing,
Swiftly spending, slowly raising,
Wishing to spend all their days in
Raking as at Mallow.
Then to end this raking life,
They get sober, take a wife,
Ever after live in strife,
And wish again for Mallow.

Granted, it isn't nearly as cool as standing silently the entire game with both index and middle finger extended in a "V"-shape while the rest of the hand is clenched into a fist, but some fanbases enjoy getting involved with the game taking place in front of them.