Cooped up like pigs

• Put in a pen
• Housed like a pig
• Confined to a pig pen
• Confined to a pen
• Penned, as a pig
• In a piggery
• Put in a 97-Across

WordNet Word definitions in WordNet
See sty

Wiktionary Word definitions in Wiktionary
vb. (en-paststy)

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Sty \Sty\, v. t. [imp. & p. p. Stied ; p. pr. & vb. n. Stying .] To shut up in, or as in, a sty. --Shak.