What does 成天 (chéng tiān) mean in English?

Card 277HSK 2010 Level 6277/2512
CARD277
PROGRESS11%
成天
chéng tiān
(coll.) all day long; all the time

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d