1) to laugh until your dick gets hard
2) to laugh at something so dirty and funny you get hard
Jake: look at this girl getting banged
Jake2: LMDH
by brilliantlywhite August 06, 2008
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Short for let my dick hang
Similar to: mind your business, give me room, and get off my back
1: where were you at 4am

2: back up and lmdh
by Csah February 07, 2021
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