adverb taking the 'to' particle
Colloquial adverb describing a hasty departure or escape, often with a sense of fleeing or making a quick exit. Used with と.
彼はすたこらさっさと逃げていった。
He hurriedly ran away.
まずいと思ったのか、すたこらさっさと帰ってしまった。
Maybe he thought it was awkward; he left in a hurry.