Misspelling of back in the day.

simple past tense and past participle of stave in

Synonym of even a blind squirrel can find a nut once in a while.

Synonym of come in handy

Of a cut of meat: containing a bone; not boneless.

Synonym of pain in the ass

Fully and freely enjoying oneself without thought to past or future.

present participle of bubble in

simple past tense and past participle of bubble in

(figuratively, idiomatic) To put one's foot in it.