I hit an exercise that had quite a lot of expressions I hadn’t heard before
Um amigo de Peniche – comes from a British action during the succession crisis of the 1580s. Nine years after the Spanish seized the portuguese crown, a force led by Francis Drake landed near Peniche ostensibly to restore the crown to Dom António, Prior do Crato, but really to prevent the Spanish launching another armada and, in the process, also doing quite a lot of looting and attempting to seize the Açores to sever the route if the Spanish silver trade. So an Amigo de Peniche is a friend who is only really looking out for what they can get out of the friendship and doesn’t really give much in return. Apparently people from Peniche are self-conscious about being associated with treachery and never miss an opportunity to tell you the true origin.
Um unhas de fome – a grasping, tight fisted person
Um atraso de vida – a harmful or annoying life problem
Um amostra de gente – a very small person
Um mãos-largas – a very generous person. Note that here (and in a couple of other expressions, the article “um” doesn’t seem to match the noun. That’s because this is a description of a person, and the default is singular and masculine, even if they are described as having wide hands – mãos largas – feminine and plural.
Um bom garfo – a gourmet
Um cabeça de alho chocho – if you are an old shriveled garlic head, you’re a forgetful, absent minded person.
Um bota de elástico – someone who dresses, acts, or thinks in an old-fashioned way