Green’s Dictionary of Slang

1. confident, secure.

1982

P. Radley My Blue-Checker Corker 77: Jerry’s recently designed trapdoor allowed Monte a shoofty freedom - even from Grandad - which he never had before.

2. smutty, obscene.

1982

P. Radley My Blue-Checker Corker 14: The gang would settle down [...] and tell yarns - some clean, some shoofty.