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English word buttmunch comes from English butt, English munch
butt (English)
(intransitive) To strike bluntly with the head.. (transitive) To strike bluntly, particularly with the head. (Northern England) Any of various flatfish such as sole, plaice or turbot (North America, slang) The buttocks (used as a euphemism in idiomatic expressions; less objectionable than arse/ass).. (carpentry) A kind of hinge used in hanging doors, etc., so named because it is attached to [...]
munch (English)
(BDSM) A casual meeting for those interested in BDSM, usually at a restaurant. See Munch (BDSM).. (colloquial) An act of eating.. (uncountable, slang) food.. A location or restaurant where good eating can be expected. To chew with a grinding, crunching sound, and with the mouth closed — often used with on.. To eat vigorously or with excitement.
buttmunch (English)
(North America, slang, derogatory) Term of abuse for a stupid or contemptible person.