Correct

马甲

/ mǎjiǎ / 
Strokes

Definition

corset/sockpuppet (Internet slang)/vest (dialect)

Example

As a Noun

waistcoat; vest

1
Mián
棉
mǎjiǎ
马甲

body warmer

2
Yī
一
jiàn
件
mǎjiǎ
马甲

a waistcoat

As a Noun

armour for a horse

As a Noun

sock puppet