Is the word abacaxis the same in Brazilian and European Portuguese?

No

While the spelling of "abacaxis" is the same in both dialects, there are significant differences in usage and meaning:

• Meaning and Usage: In Brazil, "abacaxi" is widely used as a metaphor for a "difficult problem," "a mess," or "a complication that is hard to resolve." In Portugal, the word is used almost exclusively to refer to the fruit itself; a Portuguese person would not use the word to describe a problematic situation.
• Vocabulary: In Portugal, the word "ananás" is much more common when referring to the fruit, whereas "abacaxi" is the standard term in Brazil.
• Pronunciation: In Brazil, the "s" at the end of "abacaxis" is pronounced with a soft "s" sound (like snake). In Portugal, the "s" is pronounced as a "sh" sound (like ship).

Brazilian Portuguese Examples

1. Eu adoro comer abacaxi gelado no verão. (I love eating cold pineapple in the summer.)
2. O chefe me deu um abacaxi para resolver hoje. (The boss gave me a difficult problem to solve today.)
3. Essa situação é um verdadeiro abacaxi. (This situation is a real mess.)
4. Comprei um abacaxi bem docinho no mercado. (I bought a very sweet pineapple at the market.)
5. O suco de abacaxi é muito refrescante. (Pineapple juice is very refreshing.)

Continental Portuguese Examples

1. Eu adoro comer ananás gelado no verão. (I love eating cold pineapple in the summer.)
2. O chefe deu-me um problema para resolver hoje. (The boss gave me a problem to solve today.)
3. Esta situação é uma verdadeira complicação. (This situation is a real complication.)
4. Comprei um ananás bem doce no mercado. (I bought a very sweet pineapple at the market.)
5. O sumo de ananás é muito refrescante. (Pineapple juice is very refreshing.)