What is Slip? Slip is used to refer to a smooth glide along the hair surface after applying oil or a conditioner. This is desirable in hair products since it enhances manageability and detangling. POSTS RELATED TO THIS TERM The Best 6 Conditioners For Fabulous Slip! Top 8 Detanglers For Natural Hair No-Slip Jumbo Twist Shared By Lucretia TweetPinShare0 Shares Home » Glossary » S » What is Slip?