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

• dark horse
• dark lantern
• dark matter
• dark meat
• dark red
• dark-blue
• dark-brown
• dark-coated
• dark-colored
• dark-coloured
• dark-eyed junco
• dark-field microscope
• dark-fruited
• dark-gray
• dark-green
• dark-grey
• dark-haired
• dark-skinned
• dark-spotted
• darken
• darkened
• darkener
• darkening
• darkey
• darkie