Definition of tossing:
(n) :
The motion of something that tosses; a throwing or sudden rising and falling.
(n) :
(mining) The process of washing ores by violent agitation in water, in order to separate the lighter or earthy particles; tozing.
(n) :
A process for refining tin by dropping it through the air while melted.
(adj) :
(vulgar, colloquial) Used to disparage or curse someone or something.