mobben
to bully
To systematically and repeatedly harass, torment, or socially exclude someone, especially at work or at school.
Es ist inakzeptabel, Kollegen am Arbeitsplatz zu mobben.
It is unacceptable to bully colleagues at work.

to bully
Loading your saved state.
to bully
To systematically and repeatedly harass, torment, or socially exclude someone, especially at work or at school.
Es ist inakzeptabel, Kollegen am Arbeitsplatz zu mobben.
It is unacceptable to bully colleagues at work.

Although 'mobben' (to bully) comes from the English 'to mob', its meaning in German is more specific. It means systematic harassment or bullying, not just surrounding someone as a crowd.
Er wurde in der Schule jahrelang von Mitschülern gemobbt.
He was bullied by classmates for years at school.
The verb 'mobben' (to bully) is always used with an accusative object. This object is the person who is being harassed.
Die Chefin hat ihren neuen Mitarbeiter systematisch gemobbt.
The boss systematically bullied her new employee.
'Mobben' (to bully) typically takes place in certain social environments. Common contexts are 'in der Schule' (at school), 'am Arbeitsplatz' (at work), or 'im Internet' (online).
Mobbing am Arbeitsplatz ist ein ernsthaftes Problem.
Bullying at work is a serious problem.
This verb is very often used in the passive to emphasize the victim's perspective. The construction is then 'gemobbt werden' (to be bullied).
Sie hat die Schule gewechselt, weil sie dort gemobbt wurde.
She changed schools because she was bullied there.
to annoy / to get annoyed
'ärgern' and 'mobben' can both mean that someone is treated badly or feels bad. But the difference is important. 'ärgern' can be a short or one-time situation: someone makes a joke, provokes someone, or you are annoyed about something. 'mobben' is much stronger and more serious. It happens repeatedly and systematically, often at school or at work. In this case, a person is deliberately harassed or excluded. Learners may confuse the words because both are unpleasant. But not every instance of 'ärgern' is bullying. You only use 'mobben' when it happens again and again and a person is targeted and hurt.

In der Klasse mobben einige Schüler einen neuen Jungen seit Wochen.
Some students in the class have been bullying a new boy for weeks.
Samir ärgert seinen Bruder manchmal mit kleinen Witzen.
Samir sometimes annoys his brother with little jokes.