Word: flashmobs
Part of speech: Noun
Syllables: flash
mobs
Definition: Plural of flashmob;  is a group of people who assemble suddenly in a public place, perform for a brief time, then quickly disperse, often for the purposes of entertainment, satire, and artistic expression
Morphemes:
Affix: flash
Language: en
PoS: Noun
Meaning: A sudden, short, temporary burst of light.
Affix: mob
Language: en
PoS: Noun
Meaning: A large or disorderly group of people; especially one bent on riotous or destructive action.
Etymology Compounds: Affix: mobile
Language: la
Decoded: mobile
PoS: Adjective
Meaning: fickle, inconstant
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form many pluralia tantum (nouns that are almost or entirely without singular forms).