all of a tiswas, adj. — Green’s Dictionary of Slang

all of a tiswas adj.

also all of a tizzy

[? SE ‘it is, it was’, the image is of confusion or tizzy n.²; note Tiswas, UK TV’s children’s light entertainment programme in the 1970s]

(orig. RAF) utterly confused, very excited.

1960		M. Cecil Something in Common 195: Gets you all of a tiswas, when he’s up the wall .
1970		H.E. Bates A Little of What You Fancy (1985) 455: I’m all of a tizzy this morning.
1980		J. McClure Spike Island (1981) 356: You just play him on, play him on, and at the end of it his litle brain will go bang, because he’s got himelf into such a bloody tiswas.