Construct:
Definition:	To be made redundant in the building (especially stone-masons) trade.
Use:	He got his gallon last night. He was made redundant last night.
Derivation:	Unknown, possibly due to the fact that all workers carried their gallons with them from job to job. Hence 'to get one's gallon' - to be leaving the job.
More:	"I hear that six stonies (stone-masons) got their gallon in Aherns last week." (Murphy);