The phrase ‘Fast Friends’ is used to describe good, loyal friends.
“fast friends”这个短语用来形容好的、忠诚的朋友。
比如，
“The two of them had been fast friends since college.”
他们俩从大学开始就是好朋友。
Interesting fact about Fast Friends
Although many believe that the idiom 'fast friends' means friends who developed a liking for one another quickly, the term is actually a shortened form of 'steadfast friends.'
虽然很多人认为“fast friends”这个习语是指很快就喜欢上彼此的朋友，但这个词实际上是“坚定的朋友”的缩写形式。
The origin of the idiom 'fast friends' comes from an even older version of the word 'steadfast' – Old English triewe meaning faithful, trustworthy, and steady in adhering to promises or friends.
这个用法的起源来自“坚定不移”这个词的古英语版——triewe这个词，它的意思是忠实、值得信赖、坚定不移的承诺或朋友。
“熟词偏义”是英语中常见的情况，
其实fast除了我们熟悉的“快的”的意思之外，
也有很多解释
Fast /fɑːst/
作形容词
①牢固的
The glue had set and my hand was stuck fast.
胶水凝固了，我的手被牢牢粘住。
②放荡的
a fast crowd 一群生活放荡的人
作名词
禁食期
The monk began a fast and prayed for happiness.
那个和尚开始禁食来祈福。
作动词
禁食
One day a week he fasts for health reasons.
他出于健康考虑每周禁食一天。
“fast friends”这个短语用来形容好的、忠诚的朋友。
比如，
“The two of them had been fast friends since college.”
他们俩从大学开始就是好朋友。
Interesting fact about Fast Friends
Although many believe that the idiom 'fast friends' means friends who developed a liking for one another quickly, the term is actually a shortened form of 'steadfast friends.'
虽然很多人认为“fast friends”这个习语是指很快就喜欢上彼此的朋友，但这个词实际上是“坚定的朋友”的缩写形式。
The origin of the idiom 'fast friends' comes from an even older version of the word 'steadfast' – Old English triewe meaning faithful, trustworthy, and steady in adhering to promises or friends.
这个用法的起源来自“坚定不移”这个词的古英语版——triewe这个词，它的意思是忠实、值得信赖、坚定不移的承诺或朋友。
“熟词偏义”是英语中常见的情况，
其实fast除了我们熟悉的“快的”的意思之外，
也有很多解释
Fast /fɑːst/
作形容词
①牢固的
The glue had set and my hand was stuck fast.
胶水凝固了，我的手被牢牢粘住。
②放荡的
a fast crowd 一群生活放荡的人
作名词
禁食期
The monk began a fast and prayed for happiness.
那个和尚开始禁食来祈福。
作动词
禁食
One day a week he fasts for health reasons.
他出于健康考虑每周禁食一天。
