What is "whumped"

Usage examples of "whumped".

She felt it burst out before her, prayed a sliver of glass wouldn’t slice through her throat, and heard the tremendous din behind her, then a sound like a sudden explosion before the concussion whumped through the window, blowing the remaining shards of glass out into the night.

Jeremiah McIlhaney dragged her to one side to tell her to mind her language if she didn't want to get whumped upside the head.