1. To maintain smooth, continual contact while moving down (something). Come on, just grab the pole and slide down! The crate fell out of the truck and slid the whole way down the hill.

2. To cause someone or something to move down or along (something) while maintaining smooth, continual contact. In this usage, a noun or pronoun is used between "slide" and "down." The wardrobe is too heavy to lift, so just slide it down the stairs. She hooked the bag onto the zipline and slid it down to the people below.

3. To move something down and inside of some article of clothing. In this usage, a noun or pronoun is used between "slide" and "down." She slapped him in the face when he tried to slide his hand down her shirt. The clump of snow fell on the nape of my neck and slid down my jacket.