I see this as an interesting interactive so I hope you don't mind if I join :'D my granny used a lot of proverbs and it's a part of our cultural heritage. So this phrases are important for me.
Плив-плив, а на березі всрався ("he was swimming and swimming and shitted on the shore", it's often used when someone begings to do anything but wasn't able to finish because of different obstacles)
Нагадай козі про смерть, де не ходить — там і пердь ("remind a goat of death, where it goes — it shits", my grandma used this phrase when I was picking some dumb word and was laughing at it when I was a kid)
Згадав, як срать сідав, а як надувсь — так і забувсь ("He remembered when he got to shit and then he forgot", she used it when someone unexpected reminded of themselves because they somehow remembered about her)
Вспомнила баба, як дівкою була ("The elderly remembered, how she was a young girl", when I remembered something from years ago really suddenly)
Книжка в сумці, хуй на думці ("The book is in the bag, the dick is on the mind", when someone pretends to be smart but actually they aren't)
Горобцям дулі крутити ("To show to sparrows duli" because I don't know how to translate dulya, it's a gesture that is created by putting thumb in-between index finger and middle finger. The phrase is often used when someone asks what to do and there's no visible options)
Срала-мазала, в піч лазила ("She was shitting and greasing, she was climbing into the oven", when someone does something really badly on purpose.