mob up
C1 informal inseparable intransitive
In simple words
To come together as a big, threatening group of people.
Literal meaning: 'Mob' means an unruly crowd; 'up' signals formation or gathering. To mob up: to form a mob.
Meanings
1 C1
idiomatic
informal
To gather in a large, often aggressive or intimidating group.
"Rival supporters began to mob up outside the stadium before the match even ended."
Grammar: inseparable
2 C1
idiomatic
slang
(Gaming) For enemy characters or players to gather as a threatening group.
"The enemies mobbed up near the spawn point, making it impossible to progress."
Grammar: inseparable
Usage notes
Used in contexts of street confrontation, protest, or gang activity. Also used in gaming to describe enemy characters grouping together. Uncommon in mainstream conversation; more likely in journalistic or informal online discourse about group conflict.
Commonly used with
gang crowd protestors fans outside entrance
Forms
Base
mob up
I/you/we/they
3rd person
mobs up
he/she/it
Past simple
mobed up
yesterday
Past participle
mobed up
have + pp
-ing form
mobing up
continuous
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Synonyms
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