To do something quickly, in a slipshod, or unprofessional manner.
To celebrate (a fellow printing or newspaper industry worker) to mark their completion of an apprenticeship or their retirement by (formerly) hitting metal furniture in the printing room or (more recently) hitting one's desk in the newsroom.
To eject.
Someone who works or studies seemingly way too much.
A symbol found on a musical staff that indicates the pitches represented by the lines and the spaces on the staff