What does “know one's onions” mean?

Know one's onions

Meaning: To be very knowledgeable or skilled in a particular area.

Saber mucho

Significado: Ser muy conocedor o hábil en un área particular.

Entender do assunto

Significado: Ser muito conhecedor ou habilidoso em uma área específica.

Connaître son affaire

Signification: Être très compétent ou qualifié dans un domaine particulier.

Von etwas Ahnung haben

Bedeutung: In einem bestimmten Bereich sehr sachkundig oder geschickt sein.

Sapere il fatto suo

Significato: Essere molto competente o abile in un determinato campo.

İşini bilmek

Anlam: Belirli bir alanda çok bilgili veya yetenekli olmak.

精通某事

意思: 在特定领域非常精通或有技能。

自分の分野に詳しい

意味: 特定の分野に非常に精通していること。

자신의 분야에 정통하다

의미: 특정 분야에 대해 매우 지식이 풍부하거나 능숙한 것.

Dialogue

09:25:30 - Who should we ask about fixing this old engine?

09:25:34 - Definitely Tom. He really knows his onions when it comes to vintage cars. He's been restoring them for decades.

09:25:38 - Great. I'll give him a call.

09:25:42 - You won't regret it. He's the best in town.

19:30:10 - Who should we ask about the new software?

19:30:13 - Ask Sarah. She really knows her onions when it comes to technology.

19:30:16 - Good idea. I'll talk to her tomorrow.

19:30:19 - She'll have all the answers you need.