ぐしゃっと
gushatto

Adverb

1. crushing; squashing; crumpling; squishing; with a smash; with a crunch; with a squelch

Onomatopoeia
Adverb

2. crinkling (into a broad smile); forming creases; forming wrinkles

Onomatopoeia
Applies to くしゃっとクシャっとクシャッと
Other forms: