Green’s Dictionary of Slang

swerve v.

1. (Aus.) to practise coitus interruptus [motoring imagery: one ‘avoids a child’].

[US] in E. Cray Erotic Muse (1992) 297: Our school doctor, she is a beaut, / Teaches us to swerve when our boyfriends shoot. / It saves many marriages and forced miscarriages.

2. (N.Z./US) to avoid.

[UK]J.J. Connolly Layer Cake 65: He’s on me before I know it, which is a drag cos if I’d seen him coming I would have swerved him.
[US]C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 15: Cancel plans, fail to show up: ‘I had to swerve on him after he got weird’.

3. (US) to leave.

[US]C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 15: SWERVE — leave a place: ‘He wouldn’t leave me alone last night at the club, so my friends told him to swerve’ .