"Slapping" refers to hitting or striking something quickly and with force using an open hand or other object.
Sentences with «slapping»
I'm going to put a magnet on the back, slap in on my fridge, and avoid inviting any robots over. (thatvideogameblog.com)
Don't just slap on a bunch of filters because you think it looks cool... try and edit your images to have a look and feel that is natural. (stillbeingmolly.com)
It was a base - level slap with the right. (politics.co.uk)