Getting Stuffed solution
by Kegler

Per 19 Across, PIGGING OUT, eight answers drop BOAR, HOG, PIG or SOW before entry.

Getting Stuffed solution grid

Across
1SHUFFLEBOARD {BUFFALO HERDS anag)
9A(T)RIA
11SH(OG)UNS (GO rev)
12pUTTER
14STOVE (VOTES anag)
16URNS ("EARNS" hom)
17DA(BB)LE
19PIGGING OUT
21P(L)AINT
22SP(IG)OTS (GI rev)
27T(pIEr)IN
28BIDE + T
30kEELS (rev)
31GO(NZ)O
32FOR + E.G. + ONE
Down
1S(HUT)UP
2SO WHAT (HAS TWO anag)
3FRET (2 defs)
4FIRM (hidden)
5ESTE (hidden)
6D(U)OS
7INVOLUTE (I LOVE NUT anag)
8I + SERE
10AS + L + ANT
13TON + GA (NOT rev)
15FR(ILL)IER
17DISOWNING (SIGN I'D WON anag)
18B(O + O)ED
20TSETS + E (TESTS anag)
21PATHOGEN (PHONE TAG anag)
23P + ELF
24MI + SO (I'M rev)
25OBOE ("OWE BEAU" hom)
26BOARDING (AND/OR BIG anag)
29P(I + G)EON