As adjectives the difference between tattiest and twattiest
is that tattiest is (tatty) while twattiest is (twatty).
tattiest
English
Adjective
(head)
(tatty)
tatty
English
Noun
(tatties)
(Northern England, Geordie, slang) potato
Adjective
(
er)
Dilapidated, distressed, worn-out, torn
- The tramp wore a tatty old overcoat.
See also
* tatty bye
----
twattiest
English
Adjective
(head)
(twatty) twatty
English
Adjective
(er)
(vulgar, slang) Like a twat; foolish, objectionable.