verb/kyl.by.te/
to take a tumble, fall over (of a person); to overturn (of vehicle); to bang (have sex with someone)
“Pourquoi aurait-il échappé à la règle ? Combien de jouvencelles avait-il culbutées jadis ; combien de maris avait-il mis dans la situation où il se trouvait à l’heure actuelle ?” — Why would the rule not apply to him? How many young girls had he banged before; how many husbands had he put in the very situation he was in now?
From culer + buter.