어 쑤다

a cute spelling of past-tense -었어

This is not a real construction. Every line here is an ordinary past tense -었어/-았어 written playfully as -쒀: 부러져쒀 for 부러졌어 "it broke", 그래쒀 for 그랬어 "I did that", 해쒀 for 했어. It is baby-talk spelling, used in subtitles and messages for a soft, cutesy tone, and spoken it sounds like a slightly lisped normal past tense. The verb 쑤다 ("to cook porridge") is not involved — the heading is an artefact of automatic analysis, so treat the entry as a note about spelling, not about grammar.

Register: cutesy, playful; subtitle and chat spelling

The examples below did not fully pin this one down — read them before relying on the entry above.