In these days of global warming and eco warriors, Formula One is already on shakyground for wasting huge amounts of petrol.
The Sun (2008)
If he is guilty, it will let him know that he's on shakyground.
The Sun (2014)
Definition of 'ground'
ground
(graʊnd)Explore 'ground' in the dictionary
uncountable noun [oft on adj N]
You can use ground in expressions such as on shaky ground and the same ground to refer to a particular subject, area of experience, or basis for an argument.
Definition of 'shaky'
shaky
(ʃeɪki)Explore 'shaky' in the dictionary
adjective
If you describe a situation as shaky, you mean that it is weak or unstable, and seems unlikely to last long or be successful.