1
general::
Phrase(s): *in orbit
1. Lit. [of something] circling a heavenly body. (*Typically: be ~; put something [into] ~.) • The moon is in orbit around the earth. • They put the satellite into orbit. 2. Fig. ecstatic; thrilled; emotionally high. (*Typically: be ~.) • Jane is in orbit about her new job. • John went into orbit when he got the check in the mail. 3. Inf. intoxicated. • After having six drinks all to herself, Julie was in orbit.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Thrilled, delighted, as in Dean's in orbit over his son's success. This expression alludes to the successful launching into orbit of a satellite or other spacecraft. [Slang; late 1900s]
American Heritage Idioms