BRITISH SLANG

Major changes in society have affected the way we use language, and slang words are now accepted much more as part of everyday speech. Non-native teachers and learners can feel particularly frustrated when they fail to understand the English in movies, songs, TV programmes, books, newspapers and magazines, where slang has found a regular place. The gap between the language taught or learned in school and the day-to-day language in the streets of English-speaking countries is felt even more sharply if students or teachers have the opportunity to visit these countries. 

1. OBRIGADO 2. TCHAU 3. SAÚDE!
1. Obrigado.

“Eu já paguei o nosso almoço.” “Obrigado, amigo.”

“Agora vou embora.” “Tchau, então. Até amanhã.”

HOMEM; SUJEITO, CARA

Ele é um cara muito legal.

PALAVRA USADA PARA EXPRIMIR INTENSIDADE

Isso é bom pra caramba!
Pode ser empregado também quando se está bravo ou irritado.

Seu burro!
BROLLY
GUARDA-CHUVA

É melhor levar seu guarda-chuva. Acho que vai chover.

CHINWAG
BATE-PAPO, CONVERSA INFORMAL
It was good to see you again and have a good old chinwag.
Foi ótimo te ver de novo e bater um bom papo.

CONTENTÍSSIMO, MUITO SATISFEITO, MUITO FELIZ

Eu fiquei felicíssimo com a novidade.

And for books on British, American and Australian slang with translation and explanations in Portuguese:
  

Jack Scholes has a first degree in German/Russian from Liverpool University, a Post-Graduate Certificate in Education and EFL from London University, and he is also a Licensed Master Practitioner of Neuro-Linguistic Programming. He has over 40 years experience in ELT and is now a freelance writer, trainer and ELT specialist.