Faceforth
Faceforthly is when you jump into something without thinking. It’s like you’re screaming, “I don’t care if I fail!” and then you just go for it, no plan, no brains.
He faceforthly jumped into the pool and now he’s stuck in the deep end.
She faceforthly yelled at her teacher and got sent to the office.
He faceforthly ate the whole cake and now he’s sick.