habitually and intentionally leaving typos intact in a message transmitted by electronic means, such as in a mobile phone's text message, or e-mail. Often aided by predictive text technologies such as T9. Being spanty is often done to bewilder the unsuspecting, or for personal amusement.
Molly: I'm going to moth the movie and the library today.
Molly: Of course, by "moth," I meant to type "both," but I left it in there because "moth" is awesome.
Jeff: You're so spanty.
Molly: Yeah, I'm book like that.