What is the meaning of Pisti?

over

faith, religion

pest; nuisance

Used when describing something in a derogatory way

Used as an expression similar to shit! or fuck!

to pound, crush

third-person singular past indicative of pistää

inflection of pistus:

1. genitive masculine/neuter singular
2. nominative/vocative masculine plural

genitive masculine/neuter singular

nominative/vocative masculine plural

to fuck

to beat, to fight

Source: wiktionary.org