Hola Inma,
¿Espero que estés bien?
¡He disfrutado mucho este ejercicio con todas las expresiones idiomáticas! :)
Please could you let me know if I've understood these correctly in the context of the exercise:
-higos a brevas= once in a blue moon.
-a tope= fully, to the fullest.
-de punta en blanco= dressed up to the nines, dressed to kill.
-se mantiene en sus trece= digging his heels in, sticking to his guns (refusing to go).
Also, I'm unsure about the sentence which includes "ya he liado a mis amigos..." Does liar here mean 'to manage to' or 'to trick'?
Gracias