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Australian horseracing slang for the unexpected defeat of a hot favourite; a surprise result. Later used in contexts outside horseracing for an unexpected result in any context.
Bulgarian Tszvetana Pironkova, the world No.94, caused one of the biggest boilovers on Rod Laver Arena when she came from behind to record a 2-6 6-0 9-7 victory over Venus Williams.
boilover by Quintius January 16, 2006
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boylover 

An adult, male or female, with a sexual and/or psychological attraction to young male children.
I thought Jon always hanging out with kids was kind of strange, then he confided in me that is a boylover.
boylover by Chris September 21, 2003
Related Words

BoyLover 

Boy lover
Boy love

abreviated it is BL

A boylover is a man or woman (usually man) who is sexually attracted to boys. They have their age of attractions anywhere from infant to 14 yrs old.

A boylover is a pedophile child molester wanna be or doing it now to a little boy!

Usually they do not marry or have many adult friends.
They live alone and maybe have a dog to attract boys to them in public so they can perv all over them later.
A boylover lusts after little boys.
BoyLover by you abused me February 1, 2007

bowl-over 

To add insult to injury, the team Bob was rooting for in the Superbowl lost and he suffered from a raging bowl-over the next day.
bowl-over by Schwetty Ballz February 17, 2009
A dribbling orgasm instead of an explosion. Also experienced by old people.
After too many orgasms, the guy only had a boilover
boilover by cartman197 September 14, 2006

bowl over 

A variation of the term truck

In American football in which the ball carrier lowers his shoulders and levels the defender, much like a bowling ball does to the pins
Berry Sanders had some of the greatest bowl overs ever known!
bowl over by hdevonxz September 21, 2008
When the fat on a woman (or man) doesn't just go over the edge of the jeans (as in muffintop), but spills down them as well.
You see that muffintop over there? No, Jim, she is most definitely a boilover.
Boilover by IrishPh3n0m May 27, 2012