When something is fantastic, but you want to sound ghetto.

As Shaggy said, "I'm Mr. Boombastic say me fantastic touch me in my back she says I'm Mr
Ro...mantic "
Dude 1 - "How was the party?"
Dude 2 - "Boomtastic!"

Dude - "She is Boomtastic!"

Another word for "Boombastic"
ayon kay Michael The Bone ika-25 ng Mayo, 2005
When something has good sound quality but lacks practicality..
You see someone with a car that cost about $500 but their audio system cost $5000- "man!, Dats Boomtastic!"
ayon kay BigM4C ika-11 ng Agosto, 2011
A word that mean absolutley and fantastically AMAZING!!! basically a word to use insted of amazingley (use Boom) and for absolutley fantastic (use tastic) BOOMTASTIC!!!
Dude 1: "WOAH!!!! that was totally Boomtastic dude!"

Dude2: "Richeous! how'd he do that?"

Street Skating Dude: "Yeah...I'm just that Boomtastic!"
ayon kay Jer-Hey! ika-26 ng Hunyo, 2011
Boomtastic is a word which is used at schools, box socials, and other functions and social gatherings, in an attempt to sound like some sort of mammal?! It can also be used instead of the word "the", but only in extreme situations.
1 - "Hey there Jacob, say, that'a a boomtastic moustache you've got there"
"I don't have a moustache"

2 - "Good one Julian! That was really boomtastic, now go get a haircut"

3 - "I went down to boomtastic shop boomtastic other day, and guess who I saw there? It was that slut from boomtastic party at Michael's house"
ayon kay Frankie Mondat ika-31 ng Mayo, 2005
When something is really really good.
As Shaggy said, "I'm Mr. Boombastic say me fantastic touch me in my back she says I'm Mr
Ro...mantic "

Dude 1 - "How was the party?"
Dude 2 - "Boombastic!"

Dude - "She is Boombastic!"
ayon kay Michael The Bone ika-25 ng Mayo, 2005

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