Wiktionary
slow in
vb. (context animation English) To adjust the spacing of inbetween frames so as to smoothly decelerate movement of an object as it comes to rest
Usage examples of "slow in".
The refreshments were slow in arrivingthe kitchen, too, must be in a state of confusion.
You can do over a hundred kilometers on the highroad of course but they are slow in town.
Though notoriously slow in testing, his batting average in court was high enough to make him the MVP of the police and security lab.
Their pace was slow in the heat, with the sun glaring down upon them through the hot and humid air.
They were slow in parting, and did so just enough to let him through to Rand's stirrup.