rumstehen
to stand around
Colloquial for standing idly, and often in the way, in one place without having a specific task.
Steh nicht nur rum, sondern hilf mir mal!
Don't just stand around—come help me!

to stand around
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to stand around
Colloquial for standing idly, and often in the way, in one place without having a specific task.
Steh nicht nur rum, sondern hilf mir mal!
Don't just stand around—come help me!

'Rumstehen' (to stand around) is a colloquial, separable verb. The prefix 'rum' is a short, informal form of 'herum' (around). It expresses an undirected or aimless action.
Die alten Möbel stehen nur noch im Keller rum.
The old furniture is just sitting around in the basement now.
As a separable verb, the prefix 'rum' moves to the end in a main clause. In a subordinate clause or in the infinitive with 'zu', the verb stays together.
Die Jugendlichen stehen oft am Bahnhof rum.
The teenagers often stand around at the train station.
The word 'rumstehen' (to stand around) almost always has a negative connotation. It implies that a person is lazy or useless, or that an object is in the way and making things messy.
Hör auf, nur dumm rumzustehen und pack mit an!
Stop just standing around stupidly and lend a hand!
to stand there / come across
'dastehen' and 'rumstehen' can both mean that someone is standing in one place and doing nothing. 'dastehen' is more neutral and can also express that someone is unsure or does not know what to do. 'rumstehen' is colloquial and often sounds a bit negative: the person is doing nothing, waiting unnecessarily, or standing in the way. If you only want to say that someone is standing there, 'dastehen' fits. If you are annoyed about idle standing around, 'rumstehen' sounds more natural.

Bitte steht hier nicht rum, der Eingang muss frei bleiben.
Please don't stand around here; the entrance needs to stay clear.
Nach der Ansage stand Tom unsicher im Flur da.
After the announcement, Tom stood there uncertainly in the hallway.