レロレロslurring (of speech), indistinctly, inarticulately

舌(した)が麻痺(まひ)してレロレロになる。

My tongue becomes numb and I start speaking inarticulately. {slurring (of speech), indistinctly, inarticulately}

泥酔(でいすい)した部長(ぶちょう)がレロレロ言(い)っています。

The heavily drunk department head is slurring his speech. {slurring (of speech), indistinctly, inarticulately}

まだ喋(しゃべ)れない赤(あか)ちゃんがレロレロと言(い)っている。

The baby who can't talk yet is speaking indistinctly, saying "lerolero." {slurring (of speech), indistinctly, inarticulately}

寒(さむ)さのあまり舌(した)が回(まわ)らず、レロレロになってしまいます。

The cold is so intense that my tongue becomes numb and I end up slurring my words. {slurring (of speech), indistinctly, inarticulately}

お酒(さけ)によってレロレロ喋(しゃべ)っている彼(かれ)の言葉(ことば)は理解(りかい)できません。

I cannot understand his words as he is slurring his speech due to alcohol. {slurring (of speech), indistinctly, inarticulately}