"Chan eil e uabhasach, tha ise uabhasach!"
Translation:He is not terrible, she is terrible!
None that I can see from the dictionary. From my own experience, I have heard the first hundreds of times, especially as the intensifier
Tha mi uabhasach sean 'I am terribly old'
but I have never heard the second. So unless someone else comes on here saying it is common where they come from I would avoid it if you want to be understood.