ma-
To accidentally slide down from somewhere.
Nādalosdos tanandia asing tataboan da ang
nangalap ta nioy.
He accidentally
slid down when he was coming down from picking
a coconut.
magpa-
For a person to intentionally slide, cause themselves to
slide down from somewhere.
Mareges ang magpadalosdos tang mga mola ong aldan.
The kids really insist on sliding down the staircase.