Not straight; askew:[as adverb]:he knocked my wig skew-whiff...
When the nails corrode, the tiles go skew-whiff.
Now I suspected at the time that there was something skew-whiff in Zizek's analysis of populism, and the more I think about it the more firmly I'm convinced that my initial suspicions were correct.
Some facts may a little skew-whiff - one interviewee says.