Mispronouncing, stuttering, or basically lacking the respiration, phonation, and articulation to replicate human speech. Mainly used when you stumble on a common word or a person’s name - especially a common name or well-known acquaintance.
We tried to pronounce Dan’s last name, but we ended up bumblefucking it all evening.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"