slip on
1. To step on some slippery thing or some substance and lose one's balance as a result. It's actually a lot harder to slip on a banana peel than you see in cartoons. Be careful—there's some oil near the door that I slipped on earlier.
2. To put some clothing on quickly, easily, or casually. A noun or pronoun can be used between "slip" and "on." Let me just get out of this formalwear and slip on some jeans and a tee shirt. I'm going to go slip my pajamas on.
slip something on
to put on an article of clothing, possibly in haste or casually. I will go in and slip my bathing suit on and join you in a minute. she slipped on her shoes and we left.
slip on something
to step on and slide on something. Valerie slipped on a banana peel and hurt her back. Don't slip on that wet spot on the floor!
slip on
v.1. To slide involuntarily and lose one's balance or footing as a result of stepping on something slippery: The clown slipped on a banana peel.
2. To put on some article of clothing quickly or easily: It was cold, so I slipped on a sweater. I took the ring and slipped it on.