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A blelch or blelching is the act of burping into someones orifice (anus or vag) thus filling it with gas. Then it is up to the person with the burp filled cavity to expell it at their leisure, usually right back in the blelchers own face therefore completing a full blelching cycle.
"Oh my days, she stank like week old blelch"

"Biff and Chip are blelching"
by tommo55555 February 27, 2009
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