adjective
sour, angry
A2
Sauer is an adjective meaning sour for taste and angry colloquially. It is gradable: comparative saurer, superlative am sauersten. When meaning angry it often takes the preposition auf as in sauer auf jemanden sein. Antonym is süß. Used commonly in food descriptions and in informal speech about mood.
Examples
Die Zitrone schmeckt sehr sauer.
The lemon tastes very sour.
Die Kunden waren sauer, weil das bestellte Essen nicht pünktlich geliefert wurde.
The customers were angry because the ordered food was not delivered on time.
Er ist sauer, weil das Spiel verloren wurde.
He's angry because the game was lost.
Details
Mnemonics
picture a lemon (sour) making someone frown angrily
sounds like 'sour' in English — same meaning for taste
Notes
Used both for taste (sour) and colloquially for someone being annoyed or upset.