1
general::
Phrase(s): cozy up (to someone)
1. Lit. to snuggle up to someone as if to get warm. • The children cozied up to their mother. • They cozied up to each other. 2. Fig. to try to get in good with someone; to try to increase one’s influence with someone by being extra nice and friendly. • The salesman tried to cozy up to the customer.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Try to get on friendly or intimate terms, ingratiate oneself. For example, That new woman is always cozying up to one or another club member so she'll be asked to join. [Mid-1900s]
American Heritage Idioms