When you lube up your dick with someone's shit and fuck their shit filled asshole
Logan: "It was great giving Lukas a shitty slider last night!"
Lukas: "Oh yes! Skibidi dip dip get in me!"
A women who simply tends to slide upon dongs.
Jenna: God, Ben looks so good over there, I just wanna smash.
Brenda: Jesus Jenna, you're such a dong slider.