get on like a house on fire

get on like a house on fire also get on like a house afire (be very friendly with each other; either quickly or as if nothing can get in their way) — быстро и легко (подружиться); отлично ладить друг с другом; быть в прекрасных отношениях

Example: Mary and I get on like a house on fire.

see also
[hit it off]
click