Is a kind of guy that that cares for people he is very nice and kind, loves to give advice he doesn't care about what people and is very fun to hang around and talk to...
Me: *making a jacket for my jacket potato*
Roommate: dude wtf, get some pants on, I was gonnaeat that potato!
Me: too late now, I'm seimming a jacket for him.
A Seimen Magnet is someone who attracts STD's at a quicker pace than the rest of those who are sexually active. You can generally recognise these types by their plasterboard makeup, low cut tops, almost invisible skirts despite the weather being a minus degree or several outside. Also see 'slut', 'sure thing' and 'how soon can I get a doctors appointment?' for more information.