-Someone who goes to something they weren't actually invited to
- Someone who butts into, or who is listening to a conversation
- Someone who tags along
Can be used as a noun or verb- "gegging in"
"Tony was definately gegging into our connversation before"
"Jess is such a geg"
O mummy look at that duck getting raped by a shark, that's a fuckin geg.
here my flatmate fell down the stairs today and snapped her spine - thats a fucking geg.
O MUMMAI JAYSUS - HAVIN A GEEEEEEEEEYG.
also see - anti-geg.
in german - HAFFEN UND GEGGAN.