Green’s Dictionary of Slang

pooch v.

also pouch
[SE poke]

1. (Irish) to poke around, to laze about.

[Ire]L. O’Flaherty Informer n.p.: Then I began to pouch about makin’ ready to go to bed .
[Ire](con. 1930s) P. O’Farrell Tell me, Sean O’Farrell 60: If she heard you had stopped working, she shouted: ‘If you go sweep, sweep but if you go pooch, come down’.
[Ire]Share Slanguage.

2. to seduce.

[US]Frank Zappa ‘Truck Driver Divorce’ [lyrics] Some ugly lookin’ son-of-a-bitch / Is trying’ to pooch yer HOME-TOWN SWEETHEART!

3. to stick out.

[US]S. King Dolores Claiborne 28: She’d have her lower lip all pooched out like a little kid.
[US]S. King Dreamcatcher 62: He had a pretty good pot belly pooching out the front of his sweater.