Green’s Dictionary of Slang

1. (Aus.) a drunkard.

1905

‘Doss Chiderdoss’ ‘Incredulity of Juries’ Sporting Times 18 Mar. 1/4: The former Mrs. Squiff might have been Mrs. Squiff to-day.

2. a contemptible person.

1939

E. Pound letter Feb. in Paige Sel. Letters (1971) 322: Yes, do better than that squiff, that femme ouistiti and lowest degree of animal life (apart from Cambridge Eng. profs) .

3. menstruation.

1957

G. Kersh Fowlers End (2001) 229: I shall wiggle like the devil until I’ve stopped blooping. Lover, come back to me—oh, damn this squiff!