bangburner
Keeping a girl on the bangburner involves sneaky prep-work and flirting even though you're not in a position to close the deal yet... i.e. You're seeing someone else.
Bill: I've been Snapchatting all day with Jennifer... she's so hot.
Steven: Dude. Haven't you got a girlfiend?
Bill: Yeah, I'm just keeping a few girls simmering on the bangburner for when I'm single again.
Steven: Dude. Haven't you got a girlfiend?
Bill: Yeah, I'm just keeping a few girls simmering on the bangburner for when I'm single again.