(Singapore, informal) To inconvenience or disturb; to make a fuss and bother; to act up.

(idiomatic) To cause someone to become very busy, especially to an exhausting degree; to make someone work very hard and very quickly.

(chemistry) any chloride containing three fluorine atoms in each molecule

(UK, uncountable) The invasive plant Impatiens glandulifera. / Used other than figuratively or idiomatically: see policeman, helmet.