Contraction of em um (“in a (masculine)”).

Eye dialect spelling of não.

on a whim (done without thinking seriously about the consequences)

(idiomatic) needle in a haystack

plural of agulha num palheiro

European Portuguese standard spelling of tempestade em copo d'água.

(idiomatic) in the blink of an eye (occurring extremely fast, in a moment)

(Portugal, idiomatic) to make a mountain out of a molehill

Rome wasn't built in a day (it takes a long time to create something complicated or impressive)

cardinal numeral