Social Rhino 

Unlike the "Social Butterfly" where one would "float" in and out of groups with relative ease and comfort, a social rhino is more likely to impose themselves upon a social clique. Not being able to take no for an answer, they will continue to try and "ram" their way into the group until they succeed when other members have given up trying to fight it.

Although ultimately feeling accepted into the group, one will often not notice negative feelings towards oneself behind their back.

Maria is being such a "social rhino", she just can't take a hint. I just wish I could tell her to piss off and find some other people to be friends with.

Social Rhino by Rex the Dragon February 23, 2011

social rhinoceros 

Somebody who might get confused with the "social butterfly." But they don't acknowledge awkwardness at all.

Somebody with an over-developed sense of laughing at themselves.

That guy is such a social rhinoceros! No matter how many sexual innuendos I made about his mother, he just kept taking it to the next level.

social rhinoceros by Barbatus June 23, 2009