open up
verb
High School
1
To open.
2
To widen.
3
To reveal oneself; to share personal information about oneself; to become communicative.
4
To commence firing weapons.
5
To rain.
6
To begin running, driving, travelling, etc., at maximum (or faster) speed.
7
Synonym of cheat out (“to face or turn toward the audience more than would be natural”).
8
Of wine: to develop its full flavor a short time after being uncorked and poured.