1. tight-assed - Adjective
2. tight-assed - Adverb
(informal, derogatory) Rigidly maintaining self-control; restricting oneself to generally accepted rules and behaviours.
Synonyms: conservative, conventional, inhibited, repressed, straight-laced, stuffy, uptight
Antonyms: easy-going, laid-back, relaxed
(informal, derogatory) Excessively concerned with unimportant details; obsessively precise.
Synonyms: anal, fastidious, fussy, finicky, hair-splitting, nitpicky, punctilious
(informal, derogatory) Reluctant to spend money.
Synonyms: miserly, stingy, tight-fisted
(informal) Having firm or clenched buttocks.
(informal, of an article of clothing) Fitting tightly in the area covering the buttocks.
tight-assed (not comparable)
(informal, derogatory) In an uptight or fastidious way.