also: マンマンデー
na-adjective
A Chinese loanword used as a na-adjective. Describes a relaxed, unhurried manner. Often used in casual or colloquial contexts.
from Chinese màn màn de
彼はマンマンデな性格で、いつもゆっくりしている。
He has a slow, easygoing personality and always takes things at his own pace.
マンマンデに歩こうよ。
Let's walk leisurely.
ゆっくり is the standard Japanese word for 'slowly' or 'at ease'. マンマンデ is a Chinese loanword with a similar meaning but carries a more casual, perhaps slightly exotic or playful nuance.
Borrowed from Chinese 慢慢的 (màn màn de), meaning 'slowly' or 'leisurely'. The Japanese spellings are ateji.