This is the 6358th most frequent Spanish word.
belliboni
"Belliboni" is not a standard Spanish word; it may be slang or a misspelling.
The term 'belliboni' here is used as an expression of admiration, possibly colloquial, to describe someone as very attractive.
Esa chica es muy belliboni, llama mucho la atención.
That girl is very 'belliboni', she draws a lot of attention.
In this context, 'belliboni' emphasizes the stylish or charming nature of the dress, adding a positive connotation.
El vestido que compraste es super belliboni, te queda genial.
The dress you bought is super 'belliboni', it suits you great.
Here 'belliboni' is applied to the ambiance or aesthetic surroundings, suggesting an improvement to beauty or attractiveness.