Green’s Dictionary of Slang

wobbly adj.²

unlikely, ‘shaky’, e.g. of plans or prospects.

1903		St Louis Republican (MO) 30 Aug. 52/4: You’re wabbly just now and don’t know where you’re at.
1920		Ade Hand-made Fables 53: His Execution was a bit wabbly but he could sit up to the Piano and Vamp and Four-Flush.
1923		Wodehouse Inimitable Jeeves 9: Things begin to look wobbly.
c.1930		(ref. to 1898) N. Kimball Amer. Madam (1981) 284: I was a little wobbly about the whole idea at first.
c.1940		‘The Castration of the Strawberry Roan’ in G. Logsdon Whorehouse Bells Were Ringing (1995) 94: I head for the bunkhouse, I’m nursin’ a beer. / I’m still kind o’ wobbly, I still got the shakes; / I shit like a wild cat, my damned belly aches.
1999		Guardian Guide 14–20 Aug. 54: Enjoyable swashbuckler hampered by a wobbly plot.
2013		K. Sampson Killing Pool 116: Up until that point there is so much that can go wobbly.

In compounds

wobbly eggs (n.) [the oval shape + the effect on the user]

Temazepam.

a.2003

M.A. Wright ‘Raving in Scotland’ on Ecstasy.org 🌐 Jellies or wobbly eggs are Temazepam, a prescription drug in the Benzodiazepine family (this group includes other downers like valium).

wobbly pop (n.)

(US) beer.

1997–2002

Alt. Eng. Dict. 🌐 wobbly pop (noun) beer.