
die Drecksau
asshole
A very strong, vulgar insult for a person who is seen as mean, unfair, or morally reprehensible.
Er hat mich angelogen und betrogen, diese Drecksau!
He lied to me and cheated me, that asshole!
asshole / filthy pig
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asshole
A very strong, vulgar insult for a person who is seen as mean, unfair, or morally reprehensible.
Er hat mich angelogen und betrogen, diese Drecksau!
He lied to me and cheated me, that asshole!

filthy pig
A colloquial, derogatory term for a person who is very messy or physically dirty.
Nachdem ich das Auto repariert hatte, sah ich aus wie eine Drecksau.
After I had repaired the car, I looked like a filthy pig.
This word is made up of 'Dreck' (dirt) and 'Sau' (female pig/sow). Its literal meaning is therefore 'dirty pig', which explains the strongly derogatory nature of the word.
Er nannte seinen Verräter eine „Drecksau“.
He called his betrayer a 'Drecksau' (filthy pig/asshole).
'Drecksau' (asshole/filthy pig) is a very strong and vulgar insult. It is felt to be extremely offensive and should, if used at all, be used only with extreme caution.
Pass auf, wie du mit mir redest, und nenn mich nicht Drecksau!
Watch how you talk to me, and don't call me a filthy pig!
Whether it refers to a morally bad person (m01) or simply a dirty person (m02) depends on the context. A direct, angry form of address ('Du Drecksau!' — you asshole!) usually refers to someone's character. A description of appearance ('ich sehe aus wie...' — I look like...) usually refers to dirtiness.
Hör auf, so gemein zu sein, du Drecksau!
Stop being so mean, you asshole!
pig
Both Schwein and Drecksau can refer to a person who behaves immorally. Drecksau, however, is a very strong, vulgar insult. Schwein is also derogatory, but it can be used more broadly and is not necessarily just as harsh.

Er hat seine Freunde auf besonders gemeine Weise betrogen, diese Drecksau!
He betrayed his friends in an especially vicious way, that asshole!
Er hat seine Freunde belogen, so ein Schwein!
He lied to his friends, what a pig!