Add a letter BIRD
(is the word!)
Add a letter
BIRDS
dribs which is a word it seems
Drop the DRIBS
(with no sauce)
Swapping again! R to B
BIBS
Swapping B to D
DIBS
Swapping D to M.
MIBS(Men in Black, Section Q)
Swapping I to O!
MOBS
Swapping B for S
MOSS
Swap M for B
BOSS
bla bla 20 letters
Swap
BASS
You know what word you want to use next. Do it. Doooo it.
Slapping a letter.
Sass.
adding a letter.
SASSY
and for the slightly rude humor...
Gassy
Adding a letter R
GRASSY
|Swap s for eGREASY
Dropping G and shuffling:
YEARS
Change Y => S.
SEARS(https://en.wikipedia.org/wiki/Sears_Canada)
subtracting the S!!
EARS