Honestly, as a native English speaker, I never knew that "slew" was a verb meaning "to slide violently." Hardly anyone ever uses it that way.
The context in which I most often hear "slew" used means "a large number of something."
Example:
"There was a slew of birds flying above me."
It means there were a lot of birds.
"A slew of people lined up for tickets."
It means there were many people.
There's also an archaic use of "slew" that isn't used today, which is the past tense of "slay" (meaning "to kill").
Example:
"Saint George slew the dragon."
It means "Saint George killed the dragon."
I hope this helps!