
1) Cheat; deceive 2) Slang for friend
Found on
https://www.crosswordclues.com/clue/cully

1) Dupe
Found on
https://www.crosswordclues.com/clue/cully

• (n.) A person easily deceived, tricked, or imposed on; a mean dupe; a gull. • (n.) To trick, cheat, or impose on; to deceive.
Found on
http://thinkexist.com/dictionary/meaning/cully/
Cul'ly noun ;
plural Cullies (-l...z). [ Abbrev. from
cullion .] A person easily deceived, tricked, or imposed on; a mean dupe; a gull. « I have learned that . . . I am not the first
cully whom she has passed upon for a countess.
Addison. »
Found on
http://www.encyclo.co.uk/webster/C/200
Cul'ly transitive verb [ See
Cully ,
noun , and confer Dutch
kullen to cheat, gull.] To trick, cheat, or impose on; to deceive. 'Tricks to
cully fools.'
Pomfret. Found on
http://www.encyclo.co.uk/webster/C/200

Cully is Cockney slang for a friend.
Found on
http://www.probertencyclopaedia.com/browse/ZCA.HTM
No exact match found.