This is the 3572nd most frequent French word.
issa
"Issa" is French slang used to express excitement, enthusiasm, or to hype something up, similar to "it's lit" in English.
Here, 'Issa' is utilized informally as a contracted form of 'C'est'. It is commonly used in colloquial speech to mean 'It's'.
Issa une journée magnifique pour une balade.
It's a wonderful day for a walk.
In this context, 'Issa' mimics the sound of 'Il se' to indicate reflexive action, used in informal speech.
Quand il a entendu la musique, issa danse spontanément.
When he heard the music, he danced spontaneously.
Here, 'Issa' is an informal way to express 'C'est', showing excitement or emphasis in speech.