on nodding terms

be on nodding terms with sb/sth AND have a nodding acquaintance with sb/sth (know someone slightly, just well enough to say 'hello' when you meet them; || know a little about sth) — шапочное знакомство; просто знакомые || иметь весьма поверхностное представление о чем-л.

Example 1: We haven't made any friends yet but we're on nodding terms with out neighbours.

Example 2: She can't spell and has barely a nodding acquaintance with the rules of grammar.

Also

have / be a passing acquaintance

Example 1: I didn’t really know the man who died. He was just a passing acquaintance.

Example 2: I think he’s more than a passing acquaintance. He seemed to be very close to Sarah at the party.

Opp.
[go back a long way]
run deep