ba dionk-a-dionk
Squeezing your meat and letting it go while still holding it, usually on something you don't care about.
I ba dionk-a-dionked on my pants during lunch and got laughed at.
She ba dionk-a-dionked on her desk during the test and got caught.
He ba dionk-a-dionked on his friend's face and now he smells like a sausage.