Prov.17.18

A man void of understanding striketh hands, and becometh surety in the presence of his friend.

Prov.17.18

It's stupid to try to get something for nothing, or run up huge bills you can never pay.

Prov.17.18

A man lacking in judgment strikes hands in pledge and puts up security for his neighbor.

Prov.17.18

It is poor judgment to co-sign a friend's note, to become responsible for a neighbor's debts.