familiarly

Short definition from Wiktionary

Adverb

1. 1
   With a lack of formality: In a casual or informal manner, as with a close acquaintance; especially when such behavior may be considered inappropriate.
2. 2
   In a casual or informal manner, as with a close acquaintance; especially when such behavior may be considered inappropriate: In an inappropriately sexual or romantic manner.
3. 3
   With a lack of formality: Colloquially; of common or vernacular speech, as opposed to scholarly language.
4. 4
   With knowledge or experience: In a manner prompting recognition or recollection.
5. 5
   With knowledge or experience: In a manner expressing comprehensive or intimate knowledge.