Someone that is trying to pull/hook up with someone else's girlfriend. ( Originated in the South West of England)
Example 1.
Person 1 - Yo did you clock mac chatting to Ty's girl last night?
Parson 2 - Yh fam he was skeemin
Example 2.
Person 1 - Mac needs need to get rushed bruv!
Parson 2 - Rahh peak, wasson?
Parson 2 - He's been skeemin on my girl.
Example 3.
Parson 1 - Yo can I come to that party tonight?
Parson 2 - Yh kl man just don't skeem on anyone's chick.