Adverb
In a curved or crooked manner; in a perverse or untoward manner.
Source: Webster's dictionaryIt was hidden inside another book. One Valentine was unlikely to ever open." Magnus smiled crookedly. "Simple Recipes for Housewives. No one can say your mother didn't have a sense of humor. Cassandra Clare
I thought you were dead." Magnus smiled crookedly. "What, from that scratch?" He glanced down at the reddening jacket in Alec's hand. "Okay, a deep scratch. Like, from a really, really big cat. Cassandra Clare
[Thus] the people pay for the mad folly of their princes who, evilly minded, pervert judgement and give sentence crookedly. Hesiod
When at length they rose to go to bed, it struck each man as he followed his neighbour upstairs that the one before him walked very crookedly. Robert Smith Surtees
The sower may mistake and sow his peas crookedly the peas make no mistake, but come up and show his line. Ralph Waldo Emerson
he smiled lopsidedly Source: Internet