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to throw out
to drop; to toss; to dump
to abandon; to neglect; to leave behind; to give up
to dismiss; to fire; to expel
「放り出す」 has another reading with different meanings.
責任ある仕事を途中で放り出して遊びに行くのは無責任だ。
I threw aside work and went out to play.
嫌になって計画を放り出してしまった。
I got fed up and abandoned the plan.
鞄を床に放り出した。
He tossed his bag onto the floor.