To be slow or make little progress; to act inefficiently or clumsily so that things don't move forward.
彼の説明がもたついて、会議の予定が押してしまった。
His explanation was slow and the meeting schedule got pushed back.
パソコンの動作がもたつくと仕事がはかどらない。
If the computer runs slowly, work doesn't progress.
急いでいるのに、荷物の整理でもたついてしまった。
I was in a hurry but I fumbled with the luggage and lost time.