Pichea is a popular Puerto Rican slang word derived from the English baseball term 'to pitch', which has evolved to mean 'to ignore' or 'to let something go'.
In the song, Bad Bunny begs his partner to just give him a kiss and "pichea que tenemos que hablar" (ignore that we have to talk). Mastering Caribbean slang like this is the absolute best way to finally understand the lyrics of your favorite reggaeton artists!
Have you ever gotten that dreaded text message: "We need to talk"? Bad Bunny's "Tenemos Que Hablar" is all about that specific kind of panic. The song kicks off with him seeing the message and immediately thinking, "Oh Dios, qué yo hice, qué yo hice" (Oh God, what did I do, what did I do). He runs through a list of possible crimes, from looking at another girl to maybe, just maybe, a drunken kiss he claims he can't remember. It's a funny and relatable look at someone trying to talk their way out of trouble before they even know what the trouble is.
He even tries to deflect the blame, wondering who snitched on him. He suspects it was either his girlfriend's best friend, who he says has always disliked him, or her cousin Omar, who he claims has a crush on him. The situation gets even worse when he realizes his girlfriend has already told her mom about it, and now she wants to talk to him too. The song perfectly captures that feeling of being caught and trying every possible excuse to get out of it.