LuciferOh ..when he's jealous he shows it. He walks up to you and starts to kiss you , while he's doing this he looks at the guy giving him 'She's mine back off' look and the guys walks (run's) away....you love it when he's jealous
Dean
The one thing you figure out when Dean is jealous he get territorial about you, in a away it's cute. At first when a guy would talk to you nothing...till the guy made you laugh and smile then Dean would go crazy, he would walk over to you then wrap his arms around you and if the guy didn't get the hint to leave , he would send him the most scariest glare he has, and the guy would walk away.
Sam
When it first happened ,you found it cute and it still is. At first he won't do anything like Dean , thinking its just a friendly conversation...till you start to laugh and he gets a little jealous, he would wrap his arms around you , and if your standing he likes show them how tall he is and that usually scares them away, if not he would just kiss you ...on the lips ...and it's not just any kiss it's a very steamy kiss, and with out you knowing he would look at the other guys while he kissed you ...talk about being jealous.
Cas
At first he didn't know what he was feeling ...he didn't like how the guy who was talking to you was making you blush and smile, so he went over to you and picked you up and walked away. You didn't question it ...you kinda liked it.
Gabriel
When he's jealous he Show's it , best way I can explain it is think of a kid who just had his candy stole .....or they just got there toy taken away ...yep ....him being jealous was something you don't want to miss with.
Chuck
He's territorial, but it shows more when he's drunk....let's just say you have hickeys on your neck for a couple of days....
Crowley
He's just as bad as Lucifer, and he won't let you out of his site making sure no ones comes near you.