1. To move downward or down something in a sliding, uncontrolled manner. The ground was so wet that I slipped down the side of the hill and got covered in mud. You need a belt—your pants keep slipping down!

2. To pull something downward in a quick, sliding motion. Used especially in reference to clothing. A noun or pronoun can be used between "slip" and "down." The bank robber slipped his bandana down for couple seconds to wipe his face, so I made sure to remember what he looked like. She slipped down her sock to show me the tattoo she had gotten in Thailand.

3. To move something in a lower place or position, especially in a quick, secretive, or inconspicuous manner. A noun or pronoun can be used between "slip" and "down." I slipped the microphone down so the politician wouldn't realize that his confession was being recorded. I slipped down the rope so the rest of the team could climb up through the window.

4. To stow or hide something inside of something in a lower position. A noun or pronoun is used between "slip" and "down." I slipped the bag of drugs down the drainpipe so the cops wouldn't find it on me. I saw him take some money from the collection plate and slip it down the sleeve of his shirt when he thought no one was looking.

5. To fall to a lower position, as in rankings or value. His hit song was at the top of the billboards for months, but it finally slipped down to second place this week. The tech company has been slipping down in the stock market following the sudden resignation of their CEO.