Definition of slip something in in English:

slip something in

Insert a remark smoothly or adroitly into a conversation: she slipped in a question about the length of time he’d been working on the assignment
More example sentences
  • Just slip an invitation in to the conversation like that.
  • The way she says them aren't really like accusations, but more like… casual questions, as if she's slipping them in like it's just a part of every day conversation when we both know that this is really serious stuff.
  • And then, they slipped the question in, subtly, under my defenses.
See parent entry: slip

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Word of the day retroflex
Pronunciation: ˈrɛtrə(ʊ)flɛks
adjective
turned backwards