ぐちゅぐちゅぺー
Expression- 1swishing and then spitting out (the toothpaste foam after brushing) Translated by Jiyomi
Other writings and readings
ぐちゅぐちゅぺっクチュクチュペッくちゅくちゅぺっグチュグチュペーグチュグチュペッくちゅくちゅぺークチュクチュペー
expressions (phrases, clauses, etc.)
JMdict entry 2859784. Source and licence.