マイペース
maipēsu

Noun
na-Adjective

1. (doing things at) one's own pace

スミスさんは自分 じぶんのマイペースな うま田舎道 いなかみち はしらせた。
sumisusanwa jibunno maipēsuna umao inakamichide hashiraseta.
Mr. Smith ran his sluggish horse along the country roads.

From English "my pace"

Noun
na-Adjective

2. (doing things) one's own way (esp. in an inconsiderate manner)

Other forms: