"good whirl" means to have a positive and enjoyable experience or attempt at something. It implies that things went well and gives a sense of excitement or satisfaction.
Full definition
Then throw the cooked pasta into the sauce, give
it a good whirl and wait for the the pasta to heat up a bit.
Toss the feta and the lemon juice in a food processor, and give
it a good whirl.
Give
it a good whirl to mix the first three ingredients.
The browned butter was a bit of a pill and I wound up giving
it a good whirl in my food processor to get it nice and smooth.
I add all my ingredients to my blender, give
it a good whirl and transfer to a mason jar to store in my fridge.
Now, there have been game - creation games for many years, and I've had
some good whirls with the likes of Neverwinter Nights and LittleBigPlanet.