Nick Clegg at the NUS conference April 2010; I hope your conference is going to go well. You've certainly chosen a great time to hold it – slap bang in the middle of a general election campaign.
Slap bang is used in expressions such as slap bang in the middle of somewhere to mean exactly in that place. Of course, slap-bang in the middle of town the rents are high
in a violent or sudden or noisy manner; "the pans fell slam-bang and woke the whole house"