The phrase used to judge how sexually aroused you were, or how sexually aroused someone would make you.
The phrase plays on 0 - 60mph, with "Semi" being a half erect penis.
An amazing sexy lovable girl. If you have her your very lucky. Most likely to date a boy and have a life with him if his name start with D. she gorgeous and her heart is pure gold. She’s a keeper.
In America: A person who lives in town (as opposed to the suburbs or a ghetto on the outskirts of town) Usually it is used in a derogatory manner, but sometimes it is purely descriptive.