[ 'antsi ]
■ adjective ( antsier , antsiest ) N. Amer. informal agitated, impatient, or restless.
Origin
C19: prob. from the phr. have ants in one's pants (see ant ).
ANTSY
Meaning of ANTSY in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004