push-in

[poo sh-in] /ˈpʊʃˌɪn/
adjective
1.
(of a crime) accomplished by waiting until a victim has unlocked or opened the door before making a forced entry.
Origin
1975-80; adj. use of verb phrase push in
British Dictionary definitions for push in

push in

verb
1.
(intransitive, adverb) to force one's way into a group of people, queue, etc