aggie, n.¹ — Green’s Dictionary of Slang

aggie n.¹

also aggey

[SE agricultural implement]

1. (US prison) a long-handled hoe.

1969		B. Jackson Thief’s Primer 55: aggey: hoe or other hand-held farm implement.
1971–2		C. Shafer ‘Catheads [...] and Cho-Cho Sticks’ in Abernethy Bounty of Texas (1990) 197: aggie, n. – a hoe used on the various farming units.
2000		Other Side of the Wall: Prisoner’s Dict. July 🌐 Aggie: A long handled hoe. (In Texas, field force work squads are referred to as Hoe squads, usually by their squad number such as 1-hoe, 2-hoe.).

2. see ag n.¹