I can't get behind that - Means you’re too lazy, too dumb, or too annoyed to support s

Means you’re too lazy, too dumb, or too annoyed to support something. You're not even trying to like it.

'I can't get behind that movie. I fell asleep halfway through.'

'I can't get behind that fashion choice. It looks like a sock fight.'

'I can't get behind that job. It’s like working at a grocery store on a Tuesday.'