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1.
A BLOMPY is the act of receiving a blow-job while taking a shit on the toilet at the exact same time.
Karen gave me the best blompy last night.

John: Did you have sex last night?
Sam: No, but she is a freak, she wanted to give me a blompy instead!
by Scat-a-riffic September 17, 2009
 
2.
Defecating on your sexual partner just after climax.
Jose gave a mean blompy to Tineesha last night at the Motel 6.
by JackedNick April 16, 2006