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美容室で待ってる時に100万回生きたねこあったから初めて読んだら…
→ “I saw a cat that had lived a million times while waiting at the beauty salon, so I read it for the first time and...”
美容室 biyō¹shitsu = beauty salon (n.)
美 bi = beautiful
容 yō¹ = appearance / form
室 shitsu = room / chamber
で de = at / in (location particle)
待ってる matteru = waiting (v., colloquial contraction of 'matte iru')
時 toki = time / when (n.)
に ni = while / during (time particle)
100万回 hyakuman-kai = one million times (numeral + counter)
生きた ikita = lived (v., past tense of 'ikiru')
ねこ neko = cat (n.)
あった atta = there was / existed (v., past tense of 'aru')
から kara = because / since (causal particle)
初めて hajimete = for the first time (adv.)
読んだら yondara = if I read / when I read (v., conditional 'ta' + 'ra')