To procrastinate.

“Don't put it off to the last minute.”

To delay (a task, event, etc.).

“I'm too busy to see Mr Smith today. I'll have to put him off.”

To distract; to disturb the concentration of.

“Please be quiet. I'm trying to concentrate and you're putting me off.”

Offended, repulsed

“The guest was quite put off by an odor.”

Daunted or fazed

“All but the most dedicated were put off by the huge task.”