smackhacker 

to smack up your biznatch, or smack around a person you dislike

tom: my girl was pissing me off last night
jarry: smackhacker her to get her in line

smackhacker by zilly May 22, 2006

slacknacker 

1 noun, insult used for lazy person,

Oi Slacknacker, get yer finger out!

slacknacker by Sam Clarke March 18, 2005

Slackpacker

To be a complete slut or whore whilst travelling. Can be used as a derogatory term for males or females as everyone is pretty easy whilst travelling

"Ive heard she's a right slackpacker" or this hostel is crawling with slackpackers

Slackpacker by Hendy :D July 31, 2012