A proper smelly fart that knocks you out worse than that shit they used in the war
Er mate thats a proper humdinger
by TrannyWithAFanny69 December 10, 2021
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A sexual move made to surprise the recipient. Can be done to male or female.

The individual doing it must place their lips on either the anus, vagina, or dick; they then proceed by humming loudly and quickly and deeply inserting two fingers into an available open orifice.
Guy 1: Hey how did it go with laura last night?
Guy 2: It was great, I didn't know she could hit such a high pitch!
Guy 1: what did you do?
Guy 2: I gave her a humdinger
by ConsuelaThePervert August 3, 2021
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