first thing
Speech parts
1. first thing - Noun
2. first thing - Adverb
Meaning
Early in the morning.
I'll meet you first thing at the station.
Straight away, very soon.
The basic idea of how to do something.
I would help you, but I don't know the first thing about gardening.
Used other than figuratively or idiomatically: see first, thing.
Source: en.wiktionary.orgSynonyms
Examples
The first thing I look for in a woman is warmth-femininity. It's got nothing to do with a pretty face.
If you find yourself in a hole, the first thing to do is stop digging.
Ironically, the first thing that appealed to me about Islam was its pluralism. The fact that the Koran praises all the great prophets of the past.
Do not say the first thing that comes to your mind.
If you eat a live toad first thing in the morning, nothing worse will happen all day long.
The first thing one should own is a home; and it is the last thing one should sell; for a home is ones tomb this side of heaven.