The act of when she(or he) is receiving intercourse through the ass(or viagina), and before the man orgasms he spills her guts and shoves her face into a sink while fucker she/he in he gut cavity.
"Me and my wife did The Water Buffalo last night, shes gone now"
"The Water Buffalo"
When she/he is getting fucked in the ass and right before the male cums, he spills her/his guts and shoves their face into a full sink, while fucking their empty gut cavity
Me and my wife did the water buffalo last night, she didn't survive it