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.