In great quantities; heaps; lots — an emphatic mimetic word for having a large amount of something.
市場で野菜をどっさり買って帰った。
I bought a ton of vegetables at the market and took them home.
彼は会議用の資料をどっさり持ってきた。
He brought a large stack of documents for the meeting.
お土産をどっさりもらって嬉しかった。
I was happy to receive so many souvenirs.
注文が来て、仕事がどっさり増えた。
Orders came in and my workload increased a lot.
With a heavy thud — mimetic of something dropping or being placed down with a solid, heavy sound.
彼は箱をどっさり床に置いた。
He placed the box on the floor with a heavy thud.
本をテーブルにどっさり積んだ。
He piled the books on the table with a thud.