「Spurting stance with soil」「emissions with king's」and his harem, or「sheep (without the tail) and rod fully inserted」: a good sheep became synonymous with「praiseworthy.」The lowest vertical line extension of that short sheep's tail is missing in this element because it is in the PROPER position either up and out of the way, or covered by the user, exposing and allowing access to the animal's genitalia, enabling a CORRECT PERFORMANCE with one's rod fully inserted that was worthy of praise and highly recommended in the old days of humankind and in dynastic China (𦍋).「In domesticity [that is, humans raising animals], there is a tremendous amount of sex with animals. You talk to people from village societies and pastoral societies even today and they say, 'Oh, yeah, sure.' The boys have intercourse with donkeys, occasionally intercourse with sheep. It's not uncommon. It's not even particularly shameful.」
[ quoted link https://www.fathom.com/feature/35184/index.html is now-dead, so see https://www.news24.com/life/archive/Bestiality-is-much-much-more-common-than-you-think-20150218 2023-05-17 ] (see also 嗶, and 魅 those 'demon lambs made me do it').
Oldest form and meaning of the related glyph (羋) in dictionaries is given as「SHEEP, the animal bawling or bleating.」…and we can't blame the sheep, though, considering its circumstances.
It is possible that ovine zooerastia was considered so wonderfully and morally right because no little girls, or little boys, circle jerking, or swine were involved, and a ewe or a ram never complained at an understandable communication level. Humans tupping ewes, or rams, was the least intrusive and least harmful to other human beings (humans surmised, wrongly), yet sufficiently satisfying to make the practice「the proper performance procedure」of a morally upright man, recommendable and praiseworthy. At the time, nobody guessed that such a praiseworthy and respectable morality,「the proper procedure and position」as being the mounting and humping of sheep would spread syphilis like wildfire through the human population.
Note that the fine, tight seal provided by Tupperware® products that emulates sheep tupping by disengaging only when you wish, is just coincidentally related to sheep tupping (it seems). The inventor's family name (Earl Silas Tupper) is directly related:「This interesting surname of English origin is an occupational name for a herdsman who had charge of rams,…」And「A 'tupman' was specifically a breeder of tups, the Northern English word for a ram or male sheep.」
[ https://www.surnamedb.com/Surname/Tupman 2012-02-12 ]
So, the meaning of「tupping」formerly was what male sheep (rams) do naturally with female sheep (ewes). It just seems incredible today, that's all…times do change…but to paraphrase a suggestion from one of the most well-known Jews who ever lived, let whomever is without sin cast the first stone at these cavemen…back in their day, they were all not guilty and were breaking no laws of any kind, mostly because there were no laws of any kind in their day.
Some browsers will not display this glyph using certain fonts…the actual glyph may possibly be seen within other glyphs as an element.

External source definitions
...none located, and you ought to ask yourself, why not?
Definition speculated from combining the elements and from usage in other glyphs.