The Local Way to Say It
After indulging in a delicious spread, you'll want to politely tell your host you're absolutely stuffed! In Madrid, the most natural and common way is to say "Estoy lleno/a" (I am full). The /a ending is for females. It's direct, polite, and perfectly understood across Spain. You might also hear a more informal and emphatic "Estoy a reventar" (I'm bursting!) among close friends, or simply "Ya no puedo más" (I can't anymore) with a satisfied sigh. For instance, after a huge paella, you could say: "¡Qué rico estaba todo! Pero estoy lleno, no puedo comer más." (Everything was delicious! But I'm full, I can't eat any more.) Or, if you're offered more tapas: "Gracias, pero estoy llena." (Thanks, but I'm full.) It perfectly conveys your happy state of repletion.The 'Grammar Math'
This phrase is a classic example of when to use "estar" instead of "ser". Think of it as 'Grammar Math': Estar + adjective = a temporary state or condition. You are *temporarily* full because you just ate! This is crucial because "ser" implies a permanent characteristic. So, saying "Soy lleno/a" (which would translate to 'I am a full person' or 'I am complete') is incorrect in this context and would sound very strange, like you're permanently 'full' in an abstract sense. Remember:• Estar lleno/a: To be full (from eating)
• Ser alto/a: To be tall (a permanent trait)
• Estar cansado/a: To be tired (a temporary state)
It’s all about whether the adjective describes something inherent or something fleeting.