动不动

Traditional form:

動不動

Pinyin (reading):

dòngbudòng

Definitions:

• (typically followed by 就 (jiù)) apt to (lose one's temper, catch a cold etc)
• at the drop of a hat

Characters:

• 动 - to move, to happen; movement, action
• 不 - no, not, un-; negative prefix
• 动 - to move, to happen; movement, action

Traditional characters:

• 動 - to move, to happen; movement, action
• 不 - no, not, un-; negative prefix
• 動 - to move, to happen; movement, action