Dictionary Definition:
Mugga [Vedic mudga, cp. Zimmer, Altind. Leben 240] a kind of kidney -- bean, Phaseolus mungo, freq. combd with māsa2 (q. v.). On its size (larger than sāsapa, smaller than kalāya) see A v.170 & cp. kalāya. -- D ii.293; M i.57 (+māsa); S i.150; J i.274, 429; iii.55; vi.355 (˚māsā); Miln 267, 341; SnA 283.
-- sūpa bean -- soup Vism 27. -- sūpyatā "bean -- soupcharacter," or as Vism trsl. 32 has it "bean -- currytalk"; fig. denoting a faulty character, i. e. a man who behaves like bean -- soup. The metaphor is not quite transparent; it is expld by Bdhgh as meaning a man speaking half -- truths, as in a soup of beans some are only half -- boiled. The expln is forced, & is stereotype,as well as is the combn in which it occurs. Its origin remains to be elucidated. Anyhow it refers to an unevenness in character, a flaw of character. The passage (with var. spellings) is always the foll.: cāṭukamyatā (pātu˚ Nd2; ˚kammatā Miln; pāṭu˚ Vbh) mugga -- sūpyatā (˚sūpatā Nd2; ˚suppatā Miln & KhA 236; ˚sūpatā and suppatā Vbh & VbhA 338; supyatā Vism) pāribhaṭṭatā (˚bhatyatā Vism.; ˚bhaṭṭakatā Miln; ˚bhaṭyatā & ˚bbhaṭṭatā Vbh). At Nd2391 it is used to explain sāvajja -- bhogin, at Vism 17 & Vbh 246 anācāra; at Vbh 352 lapanā; at Miln 370 it is used generally (cp. Miln trsl. ii.287). The C. expln of the Vbh passage, as given at (VbhA 483 &) Vism 17 runs as follows: "mugga -- sūpa -- samānāya sacc' âlikena jīvita kappanatāy' etaŋ adhivacanaŋ. Yathā hi muggasūpe paccante bahū muggā pākaŋ gacchanti, thokā na gacchanti, evam eva saccâlikena jīvitakappake puggale bahuŋ alikaŋ hoti, appakaŋ saccaŋ." The text at VbhA 483 is slightly different, although the sense is the same. Similarly at Vism 27.