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: