Like "tada" at the end of a magic trick dabum is use at the end of an action to show something
" -Dabum you're now pregnant "
"- Hello bro what's up, you know you told me to watch you're dog while you were on your trip right ? So dabum he's dead"
Something that smell bad (litterally or not) or something that is bad like wardrobe choice. Usually using this to talk about a bad choice/something that is really bad
Wow dude your shirt really glowne
Wow the toilets glowne
The name come from the little white pet with horn in League of Legends "poro" is used to describe something that is more than cute
"Person 1 : You told me that you had a new cat right ?
Person 2 : Yes, he's in my bedroom come to see it
Person 3 : Holy crap !! He's si poro i can't"