German Phrase
Was treibst du so?
Meaning
A casual, colloquial way to ask someone what they are doing or what they are up to. It implies a friendly curiosity rather than a formal inquiry.
When to use
Use it with friends, classmates, or colleagues in informal settings—when you bump into someone, start a chat, or want to know what they are currently occupied with.
✦Grammar Breakdown
Wastreibstduso?
Was (interrogative pronoun)
Used to ask 'what' in a question; it does not change with case in this construction.
treibst (verb treiben, 2nd person singular)
Present tense of 'treiben' meaning 'to do/engage in'; the -st ending marks 2nd person singular.
du (personal pronoun)
Subject pronoun placed after the verb in informal spoken German.
so (adverb)
Adds a colloquial nuance, roughly 'like that' or 'anyway', softening the question.
🗨In Conversation
Was treibst du so?
What are you up to?
Nicht viel, ich lese gerade ein Buch.
Not much, I'm just reading a book.
✕Common Mistakes
Was treiben du so?
Use the conjugated form 'treibst' for 'du' in present tense.
Du was treibst so?
In spoken German the subject often follows the verb, not precedes it.
Was treibst du?
Leaving out 'so' is okay, but adding it after the verb is the idiomatic version.
↔Alternatives
Was machst du gerade?
What are you doing right now?
Was geht bei dir?
What's up with you?
Was machst du so?
What are you up to?
Cultural Tip
The phrase is informal and best reserved for people you know well. In a formal context you would ask "Was machen Sie gerade?". Also, the word 'so' adds a relaxed tone; dropping it makes the question sound a bit more direct.