You're in some arbitrary location, perhaps a foreign country, you see someone with an Alabama shirt on, so you yell "Roll Mutha' Fuckin' Tide" or just "RMFT" for short.
A Royal Navy expression uttered in times of stupid orders or situations. Basically, it is wishful thinking on the utterers behalf that he will soon be out of the Navy.
Petty Officer: "You there, repaint the bulkhead a differentcolour."