This is the 11919th most frequent Russian word.
засабмитил
Submitted (informally, derived from English "submit").
In this sentence, 'засабмитил' is used to indicate the action of submitting a form.
Он засабмитил форму заявки на участие в конкурсе.
He submitted the application form to participate in the contest.
Here, 'засабмитил' means the act of sending or handing in a report for review.
Я только что засабмитил свой отчет начальнику.
I just submitted my report to the supervisor.
In this context, 'засабмитили' implies the group activity of turning in updates to a project.