Green’s Dictionary of Slang

a general excl. of annoyance.

1905		Wright E.D.D. 390/2: shittle-come-shaw, an expression of centempt.
1984		Partridge DSUE (8th edn) 1055/1: shittle-cum-shaw, shittle (or shiddle)-cum-shite, shittletidee. Occ. as nn. in allusion, often as exclamations; both contemptuous.