More from the urban dictionary:

roach

a guy or girl who is just an overprotective scumbag when it comes to dating. It doesn’t have to be a boyfriend/girlfriend. It could simply be someone who is arrogant, a jerk, a scumbag, or someone who has no regard to one’s friendship/relationship

Boy: let’s get coffee sometime, you are awesome to be with!!

Girl: uh.. I don’t know.. my boyfriend wouldn’t like that

Boy: so over-protective!!!

Girl: yea

Boy: don’t let that fucking roach tell you what to do!!!

Girl: don’t worry… will do so

Related words:

scum, dick, fag, chump, arrogant