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A swollen anal sphincter aka rosebud from multiple rounds of acidic, explosive, burning diarreah. Usually occurs after excessive partying.
Stan: Hey Roger. How was your spring break in Florida?
Roger: It was awesome brahhhh. Partied all day and night. I was hung over and puking and shitting all day. I shit so much I wound up with a Lava Blossom.

Stan: Let me see it (Roger drops trou and bends over).

Stan: OMG brohhhhh. Is that a Lava Blossom or ground hamburger? You better put some salve on that thing.
by Tugg N. Harder March 14, 2015
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