Verb (1-dan, intransitive)
1. to go uninvited; to call on without an invitation; to barge in on; to gatecrash
いきなり押しかけて悪いね。Sorry for barging in like this.
2. to throng to; to crowd into; to converge upon; to pile in
多くのファンが会場へと押しかけていた。Many fans were thronging to the venue.