Lyric discussion by ladymondegreen 

Cover art for Terry lyrics by Kirsty MacColl

Not sure, but I think the geeky guy is Terry. In the video, it's sort of ambiguous.

I think she's telling the hunk, "get lost; I've found somebody new; somebody who really cares." And when she sings "...if you don't want your nose broken You had better go away 'Cos Terry's coming round today...." Terry is understandably nervous (he mouths "Me!?")

My Interpretation