名詞 coattail:

1. the loose back flap of a coat that hangs below the waist

coat.tail

n.（名詞）
The loose back part of a coat that hangs below the waist.
男上衣后擺：上衣沒有被固定的后部，懸垂到腰下
coattails The skirts of a formal or dress coat.
coattails 夜禮服，禮服女裙

<習(xí)慣用語>on (someone`s) coattails
With the assistance of another:
得到他人的幫助：
例句：
won the mayor`s post on the senator`s coattails.
得到參議員的幫助贏得市長的職務(wù)

on the coattails of
As a result of the success of another:
因他人成功的結(jié)果：
例句：
elected to office on the coattails of a popular governor.
由于一位受人愛戴的官員的幫助而被推選到政府機關(guān)

Immediately following or as a direct result of:
緊隨其后或作為直接結(jié)果的：
例句：
resigned on the coattails of the scandal.
因丑聞而辭職