Scab

v.

Heard in Sligo, Longford and Dublin

To obtain something for free, usually money. Also, a person who habitually borrows money, sweets, alcohol and so on.

In use

I'll scab some money of that rich kid" "Ya wee scab

Posh English

I shall scrounge some money from that wealthy young fellow. You little parasite.

Same phrase, other counties