While in Ireland I heard feck used two ways.
definition 1) to toss away, usually involves mean intent toward another
person's belongings.
definition 2) to make a small theft, usually not of any great moral consequences.
1) The bullies took the book bag from the small
boy and "fecked" it into the river.
2)
Broke and feeling hungry
the boys snuck into the old man's orchard and "fecked" some apples to eat.