Top Definition
a quite practical joke involving removing the lid of the flushing compartment of a toilet and shitting into it, then closing the compartment leaving little to no evidence. the unsuspecting victim may wait months to realise why the toilet stinks like shit all the time and it is starting to flush out brown water. named such because of the way it bobs in the top for a long time like a hippopotamus.
Dave: Man I hate the guy thats hosting this party.
Jim: Yeh, so do I. Hes such a fuckwit.
Dave: Well, luckily i just left him a lurking hippo to thank him for the invite.
by dannyphantom101 June 20, 2010

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