Slip is the silky, slippery, easy detangling feeling you get with some products.
I was using the old formula Fructis Repair & Shine (AKA Triple Nutrition) for slip, but the new formula with silicones and without palm oil is horrible unfortunately. CG friendly brands that use behentrimonium that you might read reviews on to see if people are reporting good 'slip' include Curl Harmony, Komaza Care, Jessicurl and Devacurl.
Couple of useful articles
Conditioners Containing Behentrimonium Methosulfate | Curly Nikki | Natural Hair Styles and Natural Hair Care
The Secret to Super Slippery Conditioners | Curly Nikki | Natural Hair Styles and Natural Hair Care
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics