Gets off the track

Usage examples of derails.

Thus, life is to be lived either rationally, or neurotically (Freud's concept of neurosis is basically anything that derails the emergence of rational perceptiontrue enough as far as it goes, which is just not all that far).

But in the last few weeks, no amount of painful candy derails her thoughts.

He refuses to give any derails about that job, citing confidentiality and honor.