Passport-seeking missile
Someone instigating a whirlwind romance and entering into marriage with a hapless victim for the express intent of gaining citizenship in the victim's country. Whereas a gold-digger needs to be in the same location as their victim, passport-seeking missiles can lock on to targets in the US from as far away as the APAC region via Internet dating.
Tyler: Wow, Kiki just divorced Norbert... they'd only been together a few years.
Conrad: Yeah... I tried to warn him but he didn't want to listen and married a passport-seeking missile!
Conrad: Yeah... I tried to warn him but he didn't want to listen and married a passport-seeking missile!