Sex between interracial couples. Usually involving bondage such as whips, chains, uneven bars, nipple tassles, pull up rings, slap happy gloves, you name it. Derived from the hot months of summer when animals are in heat.
Yo, DeJuan and Aissa really hit it hard last night. I heard them doing the beezu all the way from apartment 4C!
1: An exclamation
2: A beast of a girl who shows her beastiality in public
Dude, that chick you were with last night at the party was such a beezu