1. In jest
   "I asked him jokingly whether he thought he could drive the Calcutta-Peshawar express"
   - jestingly 
2. Not seriously
   - facetiously, tongue-in-cheek

See also: joking

Encyclopedia: Jokingly

• double-prop
• double-propeller plane
• double-quick
• double-reed instrument
• double-space
• double-spaced
• double-spacing
• double-team
• double-tongued
• double-u
• doubled
• doubleheader
• doubler
• doubles
• doublespeak
• doublet
• doublethink
• doubleton
• doubletree
• doubling
• doubloon
• doubly
• doubly transitive verb
• doubly transitive verb form
• doubt