Supetão is a less common, more colloquial word for 'suddenly' or 'all of a sudden'. While de repente is the standard, de supetão adds a touch of surprise and abruptness that feels more impactful.
In the song, the singer describes falling in love "assim de supetão" (just like that, all of a sudden). It perfectly captures the unexpected and overwhelming nature of his newfound passion, making it a memorable and engaging word choice.
Get ready to meet a tough guy who thought he was invincible in João Gomes's "Lenda"! He says, "Sempre me julguei valente / Fosse quem fosse o home', eu enfrentava" [I always thought I was brave / No matter who the man was, I'd face him]. He was respected everywhere, a real legend in his own mind, never knowing what love was like.
But then, BAM! Love hits him out of nowhere! He sees this woman, and suddenly all his bravery vanishes. He's confused, asking, "Que comichão é esse que me tira o prumo?" [What's this itch that throws me off balance?]. He thought love was just a story, a "lenda" [legend], until this feeling comes along, squeezing his chest and making him hot. He's basically saying, "Woman, why are you doing this to me? Don't you have pity?" It's a funny and sweet take on a strong person completely disarmed by unexpected love!